name	Sir Arthur C. Clarke, CBE
pseudonym	Charles Willis,E.G. O'Brien
birth date	December 16, 1917
birth place	Minehead, Somerset, England, United Kingdom
death date	March 19, 2008
death place	Colombo, Sri Lanka
occupation	Author, inventor
alma mater	King's College London
nationality	British
citizenship	United Kingdom and Sri Lanka
spouse	Marilyn Mayfield (1953-1964)
genre	Hard science fictionPopular science
subject	Science
notableworks	''Childhood's End''''2001: A Space Odyssey''''Rendezvous with Rama''''The Fountains of Paradise''
influences	H. G. Wells, Jules Verne, Lord Dunsany, Olaf Stapledon
influenced	Stephen Baxter
website	http://www.clarkefoundation.org/ }}

Sir Arthur Charles Clarke, CBE, FRAS (16 December 1917 – 19 March 2008) was a British science fiction author, inventor, and futurist, famous for his short stories and novels, among them ''2001: A Space Odyssey'', and as a host and commentator in the British television series ''Mysterious World''. For many years, Robert A. Heinlein, Isaac Asimov, and Arthur C. Clarke were known as the "Big Three" of science fiction.

Clarke served in the Royal Air Force as a radar instructor and technician from 1941–1946. He proposed a satellite communication system in 1945 which won him the Franklin Institute Stuart Ballantine Gold Medal in 1963. He was the chairman of the British Interplanetary Society from 1947–1950 and again in 1953.

Clarke emigrated to Sri Lanka in 1956 largely to pursue his interest in scuba diving; that year, he discovered the underwater ruins of the ancient Koneswaram temple in Trincomalee. He lived in Sri Lanka until his death. He was knighted by Queen Elizabeth II in 1998, and was awarded Sri Lanka's highest civil honour, Sri Lankabhimanya, in 2005.

Biography

Clarke was born in Minehead, Somerset, England. As a boy, he enjoyed stargazing and reading old American science fiction pulp magazines. After secondary school and studying at Huish Grammar School, Taunton, he was unable to afford a university education and got a job as an auditor in the pensions section of the Board of Education.

During the Second World War he served in the Royal Air Force as a radar specialist and was involved in the early warning radar defence system, which contributed to the RAF's success during the Battle of Britain. Clarke spent most of his wartime service working on Ground Controlled Approach (GCA) radar as documented in the semi-autobiographical ''Glide Path'', his only non-science-fiction novel. Although GCA did not see much practical use in the war, it proved vital to the Berlin Airlift of 1948–1949 after several years of development. Clarke initially served in the ranks, and was a Corporal instructor on radar at No 9 Radio School, RAF Yatesbury in Wiltshire. He was commissioned as a Pilot Officer (Technical Branch) on 27 May 1943. He was promoted Flying Officer on 27 November 1943. He was appointed chief training instructor at RAF Honiley in Warwickshire and was demobilised with the rank of Flight Lieutenant. After the war he earned a first-class degree in mathematics and physics at King's College London.

In the postwar years, Clarke became the Chairman of the British Interplanetary Society from 1946-1947. and again from 1951-1953 Although he was not the originator of the concept of geostationary satellites, one of his most important contributions may be his idea that they would be ideal telecommunications relays. He advanced this idea in a paper privately circulated among the core technical members of the BIS in 1945. The concept was published in ''Wireless World'' in October of that year. Clarke also wrote a number of non-fiction books describing the technical details and societal implications of rocketry and space flight. The most notable of these may be ''The Exploration of Space'' (1951) and ''The Promise of Space'' (1968). In recognition of these contributions the geostationary orbit above the equator is officially recognised by the International Astronomical Union as a Clarke Orbit.

On a trip to Florida in 1953 Clarke met and quickly married Marilyn Mayfield, a 22-year-old American divorcee with a young son. They separated permanently after six months, although the divorce was not finalised until 1964. "The marriage was incompatible from the beginning", says Clarke. Clarke never remarried but was close to a Sri Lankan man, Leslie Ekanayake, whom the author called his "only perfect friend of a lifetime" in his dedication to ''The Fountains of Paradise''. Clarke is buried with Ekanayake, who predeceased him by three decades, in the Colombo central cemetery. In his biography of Stanley Kubrick, John Baxter cites Clarke's homosexuality as a reason why he relocated, due to more tolerant laws with regard to homosexuality in Sri Lanka. Journalists who enquired of Clarke whether he was gay were told, "No, merely mildly cheerful." However, Michael Moorcock has written: }} Moorcock's assertion is not supported by other reports, although in an interview in the July 1986 issue of ''Playboy'' magazine, Clarke stated "Of course. Who hasn't?" when asked if he had had bisexual experience.

Clarke maintained a vast collection of manuscripts and personal memoirs, maintained by his brother Fred Clarke in Taunton, Somerset, England, and referred to as the "Clarkives." Clarke said that some of his private diaries will not be published until 30 years after his death. When asked why they were sealed up, he answered "'Well, there might be all sorts of embarrassing things in them".

Writing career

While Clarke had a few stories published in fanzines, between 1937 and 1945, his first professional sales appeared in ''Astounding Science Fiction'' in 1946: "Loophole" was published in April, while "Rescue Party", his first sale, was published in May. Along with his writing Clarke briefly worked as Assistant Editor of ''Science Abstracts'' (1949) before devoting himself to writing full-time from 1951 onward. Clarke also contributed to the ''Dan Dare'' series published in Eagle, and his first three published novels were written for children.

Clarke corresponded with C. S. Lewis in the 1940s and 1950s and they once met in an Oxford pub, The Eastgate, to discuss science fiction and space travel. Clarke, after Lewis's death, voiced great praise for him, saying the ''Ransom Trilogy'' was one of the few works of science fiction that could be considered literature.

In 1948 he wrote "The Sentinel" for a BBC competition. Though the story was rejected, it changed the course of Clarke's career. Not only was it the basis for ''A Space Odyssey'', but "The Sentinel" also introduced a more cosmic element to Clarke's work. Many of Clarke's later works feature a technologically advanced but still-prejudiced mankind being confronted by a superior alien intelligence. In the cases of ''The City and the Stars'' (and its original version, ''Against the Fall of Night''), ''Childhood's End'', and the ''2001'' series, this encounter produces a conceptual breakthrough that accelerates humanity into the next stage of its evolution. In Clarke's authorised biography, Neil McAleer writes that: "many readers and critics still consider [''Childhood's End''] Arthur C. Clarke's best novel."

Clarke lived in Sri Lanka from 1956 until his death in 2008, having emigrated there when it was still called Ceylon, first in Unawatuna on the south coast, and then in Colombo. Clarke held citizenship of both the UK and Sri Lanka. He was an avid scuba diver and a member of the Underwater Explorers Club. In addition to writing, Clarke set up several diving-related ventures with his business partner Mike Wilson. In 1956, while scuba diving, Wilson and Clarke uncovered ruined masonry, architecture and idol images of the sunken original Koneswaram temple — including carved columns with flower insignias, and stones in the form of elephant heads — spread on the shallow surrounding seabed. Other discoveries included Chola bronzes from the original shrine, and these discoveries were described in Clarke's 1957 book ''The Reefs of Taprobane.'' In 1961, while filming off Great Basses Reef, Wilson found a wreck and retrieved silver coins. Plans to dive on the wreck the following year were stopped when Clarke developed paralysis, ultimately diagnosed as polio. A year later, Clarke observed the salvage from the shore and the surface. The ship, ultimately identified as belonging to the Mughal Emperor, Aurangzeb, yielded fused bags of silver rupees, cannons, and other artefacts, carefully documented, became the basis for ''The Treasure of the Great Reef''. Living in Sri Lanka and learning its history also inspired the backdrop for his novel ''The Fountains of Paradise'' in which he described a space elevator. This, he believed, would make rocket based access to space obsolete and, more than geostationary satellites, would ultimately be his scientific legacy.

His many predictions culminated in 1958 when he began a series of essays in various magazines that eventually became ''Profiles of the Future'' published in book form in 1962. A timetable up to the year 2100 describes inventions and ideas including such things as a "global library" for 2005. The same work also contained "Clarke's First Law" and text which would become Clarke's three laws in later editions.

Later years

In the early 1970s Clarke signed a three-book publishing deal, a record for a science-fiction writer at the time. The first of the three was ''Rendezvous with Rama'' in 1973, which won him all the main genre awards and has spawned sequels that, along with the ''2001'' series, formed the backbone of his later career.

In the 1980s Clarke became well known to many for his television programmes ''Arthur C. Clarke's Mysterious World'', ''Arthur C. Clarke's World of Strange Powers'' and ''Arthur C. Clarke's Mysterious Universe''. In 1986 he was named a Grand Master by the Science Fiction Writers of America. In 1988 he was diagnosed with post-polio syndrome, having originally contracted polio in 1962, and needed to use a wheelchair most of the time thereafter. Clarke was for many years a Vice Patron of the British Polio Fellowship.

In the 1989 Queen's Birthday Honours Clarke was appointed Commander of the Order of the British Empire (CBE) "for services to British cultural interests in Sri Lanka". The same year he became the first Chancellor of the International Space University, serving from 1989 to 2004 and he also served as Chancellor of Moratuwa University in Sri Lanka from 1979 to 2002.

In 1994, Clarke appeared in a science fiction film; he portrayed himself in the telefilm ''Without Warning'', an American production about an apocalyptic alien first contact scenario presented in the form of a faux newscast. That same year, he became a patron of the Gorilla Organization which fights for the preservation of lowland gorillas. When tantalum mining for cell phone manufacture threatened the gorillas, he lent his voice to their cause.

On 26 May 2000 he was made a Knight Bachelor "for services to literature" at a ceremony in Colombo. The award of a knighthood had been announced in the 1998 New Year Honours, but investiture with the award had been delayed, at Clarke's request, because of an accusation, by the British tabloid ''The Sunday Mirror'', of paedophilia. The charge was subsequently found to be baseless by the Sri Lankan police. According to ''The Daily Telegraph'' (London), the ''Mirror'' subsequently published an apology, and Clarke chose not to sue for defamation. Clarke was then duly knighted.

Although he and his home were unharmed by the 2004 Indian Ocean earthquake tsunami, his "Arthur C. Clarke Diving School" at Hikkaduwa was destroyed. He made humanitarian appeals, and the Arthur C. Clarke Foundation worked towards a better disaster notification systems. The school has since been rebuilt.

In September 2007, he provided a video greeting for NASA's Cassini probe's flyby of Iapetus (which plays an important role in ''2001: A Space Odyssey''). In December 2007 on his 90th birthday, Clarke recorded a video message to his friends and fans bidding them good-bye.

Clarke died in Sri Lanka on 19 March 2008 after suffering from respiratory failure, according to Rohan de Silva, one of his aides. His aide described the cause as respiratory complications and heart failure stemming from post-polio syndrome.

A few days before he died, he had reviewed the manuscript of his final work, ''The Last Theorem'', on which he had collaborated by e-mail with his contemporary Frederik Pohl. The book was published after Clarke's death. Clarke was buried in Colombo in traditional Sri Lankan fashion on 22 March. His younger brother, Fred Clarke, and his Sri Lankan adoptive family were among the thousands in attendance.

The Big Three

Clarke, Isaac Asimov and Robert Heinlein became known as the "Big Three" of science fiction. Clarke and Heinlein began writing to each other after ''The Exploration of Space'' was published in 1951, and first met in person the following year. They remained on cordial terms for many years, including visits in the United States and Sri Lanka. In 1984, Clarke testified before Congress against the Strategic Defense Initiative (SDI). Later, at the home of Larry Niven in California, Heinlein attacked Clarke verbally over his views on United States foreign and space policy (especially the SDI). Although the two reconciled, formally, they remained distant until Heinlein's death in 1988.

Clarke and Asimov first met in New York City in 1953, and they traded friendly insults and jibes for decades. They established a verbal agreement, the "Clarke–Asimov Treaty", that when asked who was best, the two would say Clarke was the best science fiction writer and Asimov was the best science writer. In 1972, Clarke put the "treaty" on paper in his dedication to ''Report on Planet Three and Other Speculations''.

Views

On religion

Themes of religion and spirituality appear in much of Clarke's writing. He said, "Any path to knowledge is a path to God—or Reality, whichever word one prefers to use". and described himself as "fascinated by the concept of God". Near the end of J. B. S. Haldane's life, in a personal letter to Clarke, it was suggested that he should receive a prize in theology for being one of the few people to write anything new on the subject, and went on to say that if Clarke's writings did not contain multiple contradictory theological views, he might have been a menace. When he entered the Royal Air Force, he insisted that his dog tags be marked "pantheist" rather than the default, Church of England, and in a 1991 essay entitled "Credo", described himself as a logical positivist from the age of ten. In 2000, Clarke told the Sri Lankan newspaper, ''The Island'', "I don't believe in God or an afterlife," and he identified himself as an atheist. He was honoured as a Humanist Laureate in the International Academy of Humanism. He has also described himself as a "crypto-Buddhist", insisting that Buddhism is not a religion. He displayed little interest about religion early in his life, for example, only discovering a few months after marrying that his wife had strong Presbyterian beliefs.

A famous quotation of Clarke's is often cited: "One of the great tragedies of mankind is that morality has been hijacked by religion." He was quoted in ''Popular Science'' in 2004 as saying of religion: "Most malevolent and persistent of all mind viruses. We should get rid of it as quick as we can." In a three-day "dialogue on man and his world" with Alan Watts, Clarke stated that he was biased against religion and said that he could not forgive religions for what he perceived as their inability to prevent atrocities and wars over time. In a reflection of the dialogue where he more broadly stated "mankind", his introduction to the penultimate episode of ''Mysterious World'', entitled, "Strange Skies", Clarke said, "I sometimes think that the universe is a machine designed for the perpetual astonishment of astronomers." Near the very end of that same episode, the last segment of which covered the Star of Bethlehem, he stated that his favourite theory was that it might be a pulsar. Given that pulsars were discovered in the interval between his writing the short story, "The Star" (1955), and making ''Mysterious World'' (1980), and given the more recent discovery of pulsar PSR B1913+16, he said, "How romantic, if even now, we can hear the dying voice of a star, which heralded the Christian era."

Clarke left written instructions for a funeral that stated: "Absolutely no religious rites of any kind, relating to any religious faith, should be associated with my funeral."

On paranormal phenomena

Early in his career, Clarke had a fascination with the paranormal and stated that it was part of the inspiration for his novel ''Childhood's End''. Citing the numerous promising paranormal claims that were shown to be fraudulent, Clarke described his earlier openness to the paranormal having turned to being "an almost total sceptic" by the time of his 1992 biography. During interviews, both in 1993 and 2004–2005, he stated that he did not believe in reincarnation, citing that there was no mechanism to make it possible, though he stated "I'm always paraphrasing J. B. S. Haldane: 'The universe is not only stranger than we imagine, it's stranger than we can imagine.'" He described the idea of reincarnation as fascinating, but favoured a finite existence.

Clarke was well known for his television series investigating paranormal phenomena ''Arthur C. Clarke's Mysterious World'' (1980), ''Arthur C. Clarke's Mysterious Universe'' (1985) and ''Arthur C. Clarke's World of Strange Powers'' (1994), enough to be parodied in an episode of ''The Goodies'' in which his show is cancelled after it is claimed he does not exist.

Themes, style, and influences

Clarke's work is marked by an optimistic view of science empowering mankind's exploration of the Solar System, and the world's oceans. His images of the future often feature a Utopian setting with highly developed technology, ecology, and society, based on the author's ideals. His early published stories would usually feature the extrapolation of a technological innovation or scientific breakthrough into the underlying decadence of his own society.

A recurring theme in Clarke's works is the notion that the evolution of an intelligent species would eventually make them something close to gods. This was explored in his 1953 novel ''Childhood's End'' and briefly touched upon in his novel ''Imperial Earth''. This idea of transcendence through evolution seems to have been influenced by Olaf Stapledon, who wrote a number of books dealing with this theme. Clarke has said of Stapledon's 1930 book ''Last and First Men'' that "No other book had a greater influence on my life ... [It] and its successor ''Star Maker'' (1937) are the twin summits of [Stapledon's] literary career".

Clarke also took a major interest in "Inner Space", which can be seen in his stories, ''Big Game Hunt'', ''The Deep Range'' and ''The Shining Ones'', as well as ''Dolphin Island''.

Adapted screenplays

''2001: A Space Odyssey''

Clarke's first venture into film was the Stanley Kubrick directed ''2001: A Space Odyssey''. Kubrick and Clarke had met in New York City in 1964 to discuss the possibility of a collaborative film project. As the idea developed, it was decided that the story for the film was to be loosely based on Clarke's short story "The Sentinel", written in 1948 as an entry in a BBC short story competition. Originally, Clarke was going to write the screenplay for the film, but Kubrick suggested during one of their brainstorming meetings that before beginning on the actual script, they should let their imaginations soar free by writing a novel first, upon which the film would be based. "This is more or less the way it worked out, though toward the end, novel and screenplay were being written simultaneously, with feedback in both directions. Thus I rewrote some sections after seeing the movie rushes -- a rather expensive method of literary creation, which few other authors can have enjoyed." The novel ended up being published a few months after the release of the movie.

Due to the hectic schedule of the film's production, Kubrick and Clarke had difficulty collaborating on the book. Clarke completed a draft of the novel at the end of 1964 with the plan to publish in 1965 in advance of the film's release in 1966. After many delays the film was released in the spring of 1968, before the book was completed. The book was credited to Clarke alone. Clarke later complained that this had the effect of making the book into a novelisation, that Kubrick had manipulated circumstances to downplay Clarke's authorship. For these and other reasons, the details of the story differ slightly from the book to the movie. The film contains little explanation for the events taking place. Clarke, on the other hand, wrote thorough explanations of "cause and effect" for the events in the novel. James Randi later recounted that upon seeing the premiere of 2001 for the first time, Clarke left the theatre in tears, at the intermission, after having watched an eleven-minute scene (which did not make it into general release) where an astronaut is doing nothing more than jogging inside the spaceship, which was Kubrick's idea of showing the audience how boring space travels could be.

In 1972, Clarke published ''The Lost Worlds of 2001'', which included his accounts of the production, and alternate versions, of key scenes. The "special edition" of the novel ''A Space Odyssey'' (released in 1999) contains an introduction by Clarke in which he documents the events leading to the release of the novel and film.

''2010''

In 1982 Clarke continued the ''2001'' epic with a sequel, ''2010: Odyssey Two''. This novel was also made into a film, ''2010'', directed by Peter Hyams for release in 1984. Because of the political environment in America in the 1980s, the film presents a Cold War theme, with the looming tensions of nuclear warfare not featured in the novel. The film was not considered to be as revolutionary or artistic as ''2001'', but the reviews were still positive.

Clarke's email correspondence with Hyams was published in 1984. Titled ''The Odyssey File: The Making of 2010'', and co-authored with Hyams, it illustrates his fascination with the then-pioneering medium of email and its use for them to communicate on an almost daily basis at the time of planning and production of the film while living on different continents. The book also includes ''Clarke's list of the best science-fiction films ever made''.

Clarke appeared in the film, first as the man feeding the pigeons while Dr. Heywood Floyd is engaged in a conversation in front of the White House. Later, in the hospital scene with David Bowman's mother, an image of the cover of ''Time'' portrays Clarke as the American President and Kubrick as the Russian Premier.

''Rendezvous with Rama''

Clarke's award-winning 1972 novel ''Rendezvous with Rama'' was optioned many years ago, but is currently in "development hell". In the early 2000s, actor Morgan Freeman expressed his desire to produce a film based on ''Rendezvous with Rama''. After a drawn-out development process — which Freeman attributed to difficulties in procuring funding — it appeared in 2003 this would indeed be happening. IMDb at one point upgraded the status of the project to "announced" with an estimated release date in 2009. The film was to be produced by Freeman's production company, Revelations Entertainment. David Fincher, touted on Revelations' ''Rama'' web page as far back as 2001, stated in a late 2007 interview (where he also credited the novel as an influence on the films ''Alien'' and ''Star Trek: The Motion Picture'') that he is still attached to helm. Revelations and IMDb indicated that Stel Pavlou had written the adaptation.

In late 2008, David Fincher stated the movie is unlikely to be made. "It looks like it's not going to happen. There's no script and as you know, Morgan Freeman's not in the best of health right now. We've been trying to do it but it's probably not going to happen." The IMDb page for the project was for a time removed. But in 2010 it was announced that the film was back on board for future production, and the IMDb page was restored with a projected release date in 2013. At the end of 2010, Fincher described it as still needing a worthy script.

Beyond ''2001''

''2001: A Space Odyssey'', Clarke's most famous work, was extended well beyond the 1968 movie as the Space Odyssey series. Its 1984 sequel, ''2010'' was based on Clarke's 1982 novel, ''2010: Odyssey Two''. There were two further sequels that have not been adapted to the cinema: ''2061: Odyssey Three'' and ''3001: The Final Odyssey''.

In ''2061'', Halley's Comet swings back to nearby Earth, and Clarke uses the event as an excuse to take an aged Dr. Heywood Floyd on a romp through the solar system, visiting the comet before crash-landing on Europa, where he discovers the fates of Dave Bowman, HAL 9000, and the Europan life-forms which have been protected by the Monoliths.

With ''3001: The Final Odyssey'', Clarke returns to examine the character of astronaut Frank Poole, who was killed outside ''Discovery'' by HAL in the original novel and film, but whose body was revived in the year 3001.

Essays and short stories

Most of Clarke's essays (from 1934 to 1998) can be found in the book ''Greetings, Carbon-Based Bipeds!'' (2000). Most of his short stories can be found in the book ''The Collected Stories of Arthur C. Clarke'' (2001). Another collection of early essays was published in ''The View from Serendip'' (1977), which also included one short piece of fiction, "When the Twerms Came". Clarke wrote short stories under the pseudonyms of E. G. O'Brien and Charles Willis.

Concept of the geostationary communications satellite

Clarke has contributed to the popularity of the idea that geostationary satellites would be ideal telecommunications relays. He described this concept in a paper titled ''Extra-Terrestrial Relays — Can Rocket Stations Give Worldwide Radio Coverage?'', published in ''Wireless World'' in October 1945. The geostationary orbit is now sometimes known as the Clarke Orbit or the Clarke Belt in his honour.

It is not clear that this article was actually the inspiration for the modern telecommunications satellite. According to John R. Pierce, of Bell Labs, who was involved in the Echo satellite and Telstar projects, he gave a talk upon the subject in 1954 (published in 1955), using ideas that were "in the air", but was not aware of Clarke's article at the time. In an interview given shortly before his death, Clarke was asked whether he'd ever suspected that one day communications satellites would become so important; he replied }}

Though different from Clarke's idea of telecom relay, the idea of communicating with satellites in geostationary orbit itself had been described earlier. For example, the concept of geostationary satellites was described in Hermann Oberth's 1923 book ''Die Rakete zu den Planetenräumen'' (''The Rocket into Interplanetary Space'') and then the idea of radio communication with those satellites in Herman Potočnik's (written under the pseudonym Hermann Noordung) 1928 book ''Das Problem der Befahrung des Weltraums — der Raketen-Motor (The Problem of Space Travel — The Rocket Motor)'', sections: ''Providing for Long Distance Communications and Safety'' and (possibly referring to the idea of relaying messages via satellite, but not that 3 would be optimal) ''Observing and Researching the Earth's Surface'' published in Berlin.  Clarke acknowledged the earlier concept in his book ''Profiles of the Future''.

Awards, honours and other recognition

In 1956, Clarke won a Hugo award for his short story, "The Star". Clarke won the UNESCO–Kalinga Prize for the Popularization of Science in 1961. He won the Stuart Ballantine Medal in 1963. Following the release of ''2001'', Clarke became much in demand as a commentator on science and technology, especially at the time of the Apollo space program. The fame of ''2001'' was enough to get the Command Module of the Apollo 13 craft named "Odyssey". Shared a 1969 Academy Award nomination with Stanley Kubrick in the category Best Writing, Story and Screenplay - Written Directly for the Screen for ''2001: A Space Odyssey''.

In 1986, Clarke provided a grant to fund the prize money (initially £1,000) for the Arthur C. Clarke Award for the best science fiction novel published in the United Kingdom in the previous year. In 2001 the prize was increased to £2001, and its value now matches the year (e.g., £2005 in 2005).

He received a CBE in 1989, and was knighted in 2000. Clarke's health did not allow him to travel to London to receive the honour personally from the Queen, so the United Kingdom's High Commissioner to Sri Lanka invested him as a Knight Bachelor at a ceremony in Colombo. In 1994, Clarke was nominated for a Nobel Peace Prize by law professor Glenn Reynolds. In 2000, he was named a Distinguished Supporter of the British Humanist Association.

The 2001 Mars Odyssey orbiter is named in honour of Sir Arthur's works.

In 2003, Sir Arthur was awarded the Telluride Tech Festival Award of Technology where he appeared on stage via a 3-D hologram with a group of old friends which included Jill Tarter, Neil Armstrong, Lewis Branscomb, Charles Townes, Freeman Dyson, Bruce Murray and Scott Brown.

In 2004, Sir Arthur was awarded the Heinlein Award for outstanding achievement in hard or science-oriented science fiction.

In 2005 he lent his name to the inaugural Sir Arthur Clarke Awards—dubbed "the Space Oscars". His brother attended the awards ceremony, and presented an award specially chosen by Arthur (and not by the panel of judges who chose the other awards) to the British Interplanetary Society.

On 14 November 2005 Sri Lanka awarded Clarke its highest civilian award, the Sri Lankabhimanya ''(The Pride of Sri Lanka)'', for his contributions to science and technology and his commitment to his adopted country.

Sir Arthur was the Honorary Board Chair of the Institute for Cooperation in Space, founded by Carol Rosin, and served on the Board of Governors of the National Space Society, a space advocacy organisation originally founded by Wernher von Braun.

An asteroid was named in Clarke's honour, 4923 Clarke (the number was assigned prior to, and independently of, the name - 2001, however appropriate, was unavailable, having previously been assigned to Albert Einstein).

A species of ceratopsian dinosaur, ''Serendipaceratops arthurcclarkei'', discovered in Inverloch in Australia.

The Learning Resource Centre at Richard Huish College, Taunton, which Clarke attended when it was Huish Grammar School, is named after him.

Clarke was a distinguished vice-president of the H. G. Wells Society, being strongly influenced by H. G. Wells as a science-fiction writer.

The main protagonist of the Dead Space series of video games, Isaac Clarke, takes his surname from Arthur C. Clarke, and his given name from Clarke's friendly rival and associate, Isaac Asimov.

A proposed outer-circular orbital beltway in Colombo, Sri Lanka is to be named 'Arthur C. Clarke Expressway' in honor of Clarke.

Awards established as legacy

Sir Arthur Clarke Award, for achievements in space, awarded annually in the United Kingdom.

Arthur C. Clarke Awards for science fiction writing, awarded annually in the United Kingdom.

Arthur C. Clarke Foundation scholarships and awards. The Sir Arthur C. Clarke Memorial Trophy Inter School Astronomy Quiz Competition, held in Sri Lanka every year and organized by the Astronomical Association of Ananda College, Colombo. The competition first started in 2001.

Partial bibliography

Select novels

''The Sands of Mars'' (1951)

''Prelude to Space'' (1953)

''Childhood's End'' (1953)

''The City and the Stars'' (1956)

''A Fall of Moondust'' (1961) (Hugo nominee, 1963)

''2001: A Space Odyssey'' (1968)

''Rendezvous with Rama'' (1972) (BSFA and Nebula Awards winner, 1973; Hugo, Campbell, and Locus Awards winner, 1974)

''A Meeting with Medusa'' (Nebula Award for best novella) (1972)

''Imperial Earth'' (1975)

''The Fountains of Paradise'' (1979) (Hugo Award winner, BSFA nominee, 1979; and Nebula Award winner, Locus Award nominee, 1980) ''2010: Odyssey Two'' (1982) (Hugo and Locus Awards nominee, 1983)

''The Songs of Distant Earth'' (1986)

''2061: Odyssey Three'' (1987)

''3001: The Final Odyssey'' (1997)

''The Light of Other Days'' (2000) (with Stephen Baxter)

Short story collections

''Expedition to Earth'' (1953)

''Reach for Tomorrow'' (1956)

''Tales from the White Hart'' (1957)

''The Other Side of the Sky'' (1958)

''Tales of Ten Worlds'' (1962)

''The Nine Billion Names of God'' (1967)

''The Wind from the Sun'' (1972)

''The Best of Arthur C. Clarke'' (1973)

''The Sentinel'' (1983)

''The Collected Stories of Arthur C. Clarke'' (2001)

Non-fiction

''Interplanetary Flight: an introduction to astronautics''. London: Temple Press, 1950

''The Exploration of Space''. New York: Harper, 1951

''Voice Across the Sea''. New York: Harper, 1958

''Voices from the Sky: Previews of the Coming Space Age''. New York: Harper & Row, 1965

''Astounding Days: A Science Fictional Autobiography''. London: Gollancz, 1989

''Greetings, Carbon-Based Bipeds! : Collected Works 1934-1998''. New York: St. Martin's Press, 1999

1977

Notes

:a. Full text: :b. Full text:

References

External links

The Arthur C. Clarke Foundation

Sir Arthur Clarke Awards

Sir Arthur C Clarke: 90th Birthday Reflections

Arthur C. Clarke (1917-2008) International Astronautical Federation

Arthur C. Clarke 31 word short story on Letters of Note

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af:Arthur C. Clarke als:Arthur C. Clarke ar:آرثر سي كلارك an:Arthur C. Clarke az:Artur Klark bn:আর্থার সি ক্লার্ক zh-min-nan:Arthur C. Clarke be:Артур Кларк be-x-old:Артур Кларк bg:Артър Кларк ca:Arthur C. Clarke cs:Arthur C. Clarke cy:Arthur C. Clarke da:Arthur C. Clarke de:Arthur C. Clarke et:Arthur C. Clarke el:Άρθουρ Κλαρκ es:Arthur C. Clarke eo:Arthur C. Clarke eu:Arthur C. Clarke fa:آرتور سی. کلارک fr:Arthur C. Clarke ga:Arthur C. Clarke gl:Arthur C. Clarke ko:아서 C. 클라크 hr:Arthur C. Clarke id:Arthur C. Clarke is:Arthur C. Clarke it:Arthur Charles Clarke he:ארתור סי קלארק jv:Arthur C. Clarke ka:ართურ კლარკი kk:Сэр Артур Чарлз Кларк la:Arthurus Clarke lv:Arturs Klārks lb:Arthur C. Clarke lt:Arthur C. Clarke hu:Arthur C. Clarke mk:Артур Ч. Кларк ml:ആർതർ സി. ക്ലാർക്ക് mr:आर्थर सी. क्लार्क nl:Arthur C. Clarke ja:アーサー・C・クラーク no:Arthur C. Clarke pl:Arthur C. Clarke pt:Arthur C. Clarke ro:Arthur C. Clarke ru:Кларк, Артур Чарльз simple:Arthur C. Clarke sk:Arthur C. Clarke sl:Arthur Charles Clarke sr:Артур Ч. Кларк sh:Arthur C. Clarke fi:Arthur C. Clarke sv:Arthur C. Clarke tl:Arthur C. Clarke ta:ஆர்தர் சி. கிளார்க் th:อาร์เธอร์ ซี. คลาร์ก tr:Arthur C. Clarke uk:Артур Кларк zh-yue:Arthur C. Clarke zh:亞瑟·查理斯·克拉克

name	Carl Sagan
birth date	November 09, 1934
birth place	Brooklyn, New York City, U.S.
residence	United States
nationality	American
death date	December 20, 1996
death place	Seattle, Washington, U.S.
death cause	Pneumonia
education	Rahway High School
alma mater	University of Chicago,Cornell University
field	Astronomy, Astrophysics, Cosmology, Astrobiology, Space science, Planetary science
work institutions	Cornell University Harvard University Smithsonian Astrophysical Observatory University of California, Berkeley
alma mater	University of Chicago (B.A.), (B.Sc.), (M.Sc.), (Ph.D.)
known for	Search for Extra-Terrestrial Intelligence (SETI) ''Cosmos: A Personal Voyage'' ''Cosmos'' Voyager Golden Record Pioneer plaque ''Contact'' ''Pale Blue Dot''
prizes	Oersted Medal (1990) NASA Distinguished Public Service Medal (twice) Pulitzer Prize for General Non-Fiction (1978) National Academy of Sciences Public Welfare Medal (1994) }}

Carl Edward Sagan () (November 9, 1934 December 20, 1996) was an American astronomer, astrophysicist, cosmologist, author, science popularizer, and science communicator in the space and natural sciences. During his lifetime, he published more than 600 scientific papers and popular articles and was author, co-author, or editor of more than 20 books. In his works, he advocated skeptical inquiry and the scientific method. He pioneered exobiology and promoted the Search for Extra-Terrestrial Intelligence (SETI).

Sagan became world-famous for his popular science books and for the award-winning 1980 television series ''Cosmos: A Personal Voyage'', which he narrated and co-wrote. A book to accompany the program was also published. Sagan also wrote the novel ''Contact'', the basis for the 1997 film of the same name.

Early life

Carl Sagan was born in Brooklyn, New York City, to a Ukrainian Jewish family. His father, Sam Sagan, was an immigrant garment worker from Kamenets-Podolsk, Ukraine; his mother, Rachel Molly Gruber, a housewife. Carl was named in honor of Rachel's biological mother, Chaiya Clara, in Sagan's words, "the mother she never knew." Sagan graduated from Rahway High School in Rahway, New Jersey, in 1951.

He had one sister, Carol, and the family lived in a modest apartment near the Atlantic Ocean, in Bensonhurst, a Brooklyn neighborhood. According to Sagan, they were Reform Jews, the most liberal of the three main Jewish groups. Both Sagan and his sister agree that their father was not especially religious, but that their mother "definitely believed in God, and was active in the temple ... and served only Kosher meat." During the height of the Depression, his father had to accept a job as a theater usher.

According to biographer Keay Davidson, Sagan's "inner war" was a result of his close relations with both his parents, who were in many ways "opposites." Sagan traced his later analytical urges to his mother, a woman who had known "extreme poverty as a child," and had grown up almost homeless in New York City during World War I and the 1920s. She had her own intellectual ambitions as a young woman, but they were blocked by social restrictions, because of her poverty, her being a woman and wife, and her Jewish religion. Davidson notes that she therefore "worshiped her only son, Carl. He would fulfill her unfulfilled dreams."

However, his "sense of wonder" came from his father, who was a "quiet and soft-hearted escapee from the Czar." In his free time, he gave apples to the poor, or helped soothe labor-management tensions within New York's "tumultuous" garment industry. Although he was "awed" by Carl's "brilliance, his boyish chatter about stars and dinosaurs," he took his son's inquisitiveness in stride, as part of his growing up. In his later years as a writer and scientist, Sagan would often draw on his childhood memories to illustrate scientific points, as he did in his book, ''Shadows of Forgotten Ancestors''. Sagan describes his parents' influence on his later thinking:

:''My parents were not scientists. They knew almost nothing about science. But in introducing me simultaneously to skepticism and to wonder, they taught me the two uneasily cohabiting modes of thought that are central to the scientific method.''

1939 World's Fair

Sagan recalls that one of his best experiences was when he was four or five years old, his parents took him to the 1939 New York World's Fair. The exhibits became a turning point in his life. He later recalled the moving map of the "America of Tomorrow" exhibit: "It showed beautiful highways and cloverleaves and little General Motors cars all carrying people to skyscrapers, buildings with lovely spires, flying buttresses — and it looked great!" At other exhibits, he remembered how a flashlight that shined on a photoelectric cell created a cracking sound, and how the sound from a tuning fork became a wave on an oscilloscope. He also witnessed the future media technology that would replace radio: television. Sagan wrote:

:''Plainly, the world held wonders of a kind I had never guessed. How could a tone become a picture and light become a noise?''

He also saw one of the Fair's most publicized events, the burial of a time capsule at Flushing Meadows, which contained mementos of the 1930s to be recovered by Earth's descendants in a future millennium. "The time capsule thrilled Carl," writes Davidson. As an adult, Sagan and his colleagues created similar time capsules, but ones that would be sent out into the galaxy. These were the Pioneer plaque and the ''Voyager Golden Record'' records, all of which were spinoffs of Sagan's memories of the World Fair.

World War II

During World War II, Sagan's family worried about the fate of their European relatives. Sagan, however, was generally unaware of the details of the ongoing war. He writes, "Sure, we had relatives who were caught up in the Holocaust. Hitler was not a popular fellow in our household ... But on the other hand, I was fairly insulated from the horrors of the war." His sister, Carol, said that their mother "above all wanted to protect Carl ... She had an extraordinarily difficult time dealing with World War II and the Holocaust." Sagan's book, ''The Demon-Haunted World'' (1996), included his memories of this conflicted period in his life, where his family dealt with the realities of the war in Europe, but tried to prevent it from undermining his optimistic spirit.

Inquisitiveness about nature

Soon after entering elementary school, he began to express a strong inquisitiveness about nature. Sagan recalled taking his first trips to the public library alone, at the age of five, when his mother got him a library card. He wanted to learn what stars were, since none of his friends or their parents could give him a clear answer: :''I went to the librarian and asked for a book about stars ... And the answer was stunning. It was that the Sun was a star but really close. The stars were suns, but so far away they were just little points of light ... The scale of the universe suddenly opened up to me. It was a kind of religious experience. There was a magnificence to it, a grandeur, a scale which has never left me. Never ever left me.''

About the time he was six or seven, he and a close friend took trips to the American Museum of Natural History in New York City. While there, they went to the Hayden Planetarium and walked around the museum's exhibits of space objects, such as meteorites, and displays of dinosaurs and animals in natural settings. Sagan writes about those visits: :''I was transfixed by the dioramas — lifelike representations of animals and their habitats all over the world. Penguins on the dimly lit Antarctic ice; ... a family of gorillas, the male beating his chest, ... an American grizzly bear standing on his hind legs, ten or twelve feet tall, and staring me right in the eye.''

His parents helped nurture his growing interest in science by buying him chemistry sets and reading materials. His interest in space, however, was his primary focus, especially after reading science fiction stories by writers such as Edgar Rice Burroughs, which stirred his imagination about life on other planets, such as Mars. According to biographer Ray Spangenburg, these early years as Sagan tried to understand the mysteries of the planets, became a "driving force in his life, a continual spark to his intellect, and a quest that would never be forgotten."

Education and scientific career

He attended the University of Chicago, where he participated in the Ryerson Astronomical Society, received a bachelor of arts with general and special honors in 1954, a bachelor of science in 1955, and a master of science in physics in 1956 before earning a PhD in astronomy and astrophysics in 1960. During his time as an undergraduate, Sagan worked in the laboratory of the geneticist H. J. Muller. From 1960 to 1962 Sagan was a Miller Fellow at the University of California, Berkeley. From 1962 to 1968, he worked at the Smithsonian Astrophysical Observatory in Cambridge, Massachusetts.

Sagan lectured and did research at Harvard University until 1968, when he moved to Cornell University in Ithaca, New York. He became a full Professor at Cornell in 1971, and he directed the Laboratory for Planetary Studies there. From 1972 to 1981, Sagan was the Associate Director of the Center for Radio Physics and Space Research at Cornell.

Sagan was associated with the American space program from its inception. From the 1950s onward, he worked as an advisor to NASA, where one of his duties included briefing the Apollo astronauts before their flights to the Moon. Sagan contributed to many of the robotic spacecraft missions that explored the solar system, arranging experiments on many of the expeditions. He conceived the idea of adding an unalterable and universal message on spacecraft destined to leave the solar system that could potentially be understood by any extraterrestrial intelligence that might find it. Sagan assembled the first physical message that was sent into space: a gold-anodized plaque, attached to the space probe Pioneer 10, launched in 1972. Pioneer 11, also carrying another copy of the plaque, was launched the following year. He continued to refine his designs; the most elaborate message he helped to develop and assemble was the Voyager Golden Record that was sent out with the Voyager space probes in 1977. Sagan often challenged the decisions to fund the Space Shuttle and Space Station at the expense of further robotic missions.

Sagan taught a course on critical thinking at Cornell University until he died in 1996 from pneumonia, a few months after finding that he was in remission of myelodysplastic syndrome.

Scientific achievements

Sagan's contributions were central to the discovery of the high surface temperatures of the planet Venus. In the early 1960s no one knew for certain the basic conditions of that planet's surface, and Sagan listed the possibilities in a report later depicted for popularization in a Time-Life book, ''Planets''. His own view was that Venus was dry and very hot as opposed to the balmy paradise others had imagined. He had investigated radio emissions from Venus and concluded that there was a surface temperature of . As a visiting scientist to NASA's Jet Propulsion Laboratory, he contributed to the first Mariner missions to Venus, working on the design and management of the project. Mariner 2 confirmed his conclusions on the surface conditions of Venus in 1962.

Sagan was among the first to hypothesize that Saturn's moon Titan might possess oceans of liquid compounds on its surface and that Jupiter's moon Europa might possess subsurface oceans of water. This would make Europa potentially habitable for life. Europa's subsurface ocean of water was later indirectly confirmed by the spacecraft Galileo. Sagan also helped solve the mystery of the reddish haze seen on Titan, revealing that it is composed of complex organic molecules constantly raining down onto the moon's surface.

He further contributed insights regarding the atmospheres of Venus and Jupiter as well as seasonal changes on Mars. Sagan established that the atmosphere of Venus is extremely hot and dense with pressures increasing steadily all the way down to the surface. He also perceived global warming as a growing, man-made danger and likened it to the natural development of Venus into a hot, life-hostile planet through a kind of runaway greenhouse effect. Sagan and his Cornell colleague Edwin Ernest Salpeter speculated about life in Jupiter's clouds, given the planet's dense atmospheric composition rich in organic molecules. He studied the observed color variations on Mars' surface and concluded that they were not seasonal or vegetational changes as most believed but shifts in surface dust caused by windstorms.

Sagan is best known, however, for his research on the possibilities of extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation.

He is also the 1994 recipient of the Public Welfare Medal, the highest award of the National Academy of Sciences for "distinguished contributions in the application of science to the public welfare." He was denied membership in the Academy, reportedly because his media activities made him unpopular with many other scientists.

Sagan's ability to convey his ideas allowed many people to better understand the cosmos — simultaneously emphasizing the value and worthiness of the human race, and the relative insignificance of the Earth in comparison to the universe. He delivered the 1977 series of Royal Institution Christmas Lectures in London. He hosted and, with Ann Druyan, co-wrote and co-produced the highly popular thirteen-part PBS television series ''Cosmos: A Personal Voyage'' modeled on Jacob Bronowski's ''The Ascent of Man''.

Sagan was a proponent of the search for extraterrestrial life. He urged the scientific community to listen with radio telescopes for signals from intelligent extraterrestrial life-forms. So persuasive was he that by 1982 he was able to get a petition advocating SETI published in the journal ''Science'' and signed by 70 scientists including seven Nobel Prize winners. This was a tremendous turnaround in the respectability of this controversial field. Sagan also helped Dr. Frank Drake write the Arecibo message, a radio message beamed into space from the Arecibo radio telescope on November 16, 1974, aimed at informing extraterrestrials about Earth.

Sagan was chief technology officer of the professional planetary research journal ''Icarus'' for twelve years. He co-founded the ''Planetary Society'', the largest space-interest group in the world, with over 100,000 members in more than 149 countries, and was a member of the SETI Institute Board of Trustees. Sagan served as Chairman of the Division for Planetary Science of the American Astronomical Society, as President of the Planetology Section of the American Geophysical Union, and as Chairman of the Astronomy Section of the American Association for the Advancement of Science.

At the height of the Cold War, Sagan became involved in public awareness efforts for the effects of nuclear war when a mathematical climate model suggested that a substantial nuclear exchange could upset the delicate balance of life on Earth. He was one of five authors — the "S" of the "TTAPS" report as the research paper came to be known. He eventually co-authored the scientific paper hypothesizing a global nuclear winter following nuclear war. He also co-authored the book ''A Path Where No Man Thought: Nuclear Winter and the End of the Arms Race'', a comprehensive examination of the phenomenon of nuclear winter.

''Cosmos'' covered a wide range of scientific subjects including the origin of life and a perspective of our place in the universe. The series was first broadcast by the Public Broadcasting Service in 1980, winning an Emmy and a Peabody Award. It has been broadcast in more than 60 countries and seen by over 500 million people, making it the most widely watched PBS program in history. In addition, ''Time'' magazine ran a cover story about Sagan soon after the show broadcast, referring to him as "creator, chief writer and host-narrator of the new public television series Cosmos, [and] takes the controls of his fantasy spaceship."

Sagan also wrote books to popularize science, such as ''Cosmos'', which reflected and expanded upon some of the themes of ''A Personal Voyage'', and became the best-selling science book ever published in English; ''The Dragons of Eden: Speculations on the Evolution of Human Intelligence'', which won a Pulitzer Prize; and ''Broca's Brain: Reflections on the Romance of Science''. Sagan also wrote the best-selling science fiction novel ''Contact'' in 1985, based on a film treatment he wrote with his wife in 1979, but he did not live to see the book's 1997 motion picture adaptation, which starred Jodie Foster and won the 1998 Hugo Award for Best Dramatic Adaption.

thumb|left|Pale Blue Dot: Earth is a bright pixel when photographed from "Voyager 1" six billion kilometers out (past Pluto). Sagan encouraged NASA to generate this image. He wrote a sequel to ''Cosmos,'' ''Pale Blue Dot: A Vision of the Human Future in Space'', which was selected as a notable book of 1995 by ''The New York Times''. He appeared on PBS' Charlie Rose program in January 1995. Sagan also wrote an introduction for the bestselling book by Stephen Hawking, ''A Brief History of Time''. Sagan was also known for his popularization of science, his efforts to increase scientific understanding among the general public, and his positions in favor of scientific skepticism and against pseudoscience, such as his debunking of the Betty and Barney Hill abduction. To mark the tenth anniversary of Sagan's passing, David Morrison, a former student of Sagan, recalled "Sagan's immense contributions to planetary research, the public understanding of science, and the skeptical movement" in ''Skeptical Inquirer''.

Sagan hypothesized in January 1991 that enough smoke from the 1991 Kuwaiti oil fires "might get so high as to disrupt agriculture in much of South Asia ..." He later conceded in ''The Demon-Haunted World'' that this prediction did not turn out to be correct: "it ''was'' pitch black at noon and temperatures dropped 4°–6°C over the Persian Gulf, but not much smoke reached stratospheric altitudes and Asia was spared." A 2007 study noted that modern computer models have been applied to the Kuwait oil fires, finding that individual smoke plumes are not able to loft smoke into the stratosphere, but that smoke from fires covering a large area, like some forest fires or the burning of cities that would be expected to follow a nuclear strike, would loft significant amounts of smoke into the stratosphere.

In his later years Sagan advocated the creation of an organized search for near Earth objects that might impact the Earth. When others suggested creating large nuclear bombs that could be used to alter the orbit of a NEO that was predicted to hit the Earth, Sagan proposed the Deflection Dilemma: If we create the ability to deflect an asteroid away from the Earth, then we also create the ability to deflect an asteroid towards the Earth — providing an evil power with a true doomsday bomb.

Billions and billions

From ''Cosmos'' and his frequent appearances on ''The Tonight Show Starring Johnny Carson'', Sagan became associated with the catchphrase "billions and billions". Sagan stated that he never actually used the phrase in the ''Cosmos'' series. The closest that he ever came was in the book ''Cosmos'', where he talked of "billions ''upon'' billions": }}

However, his frequent use of the word ''billions'', and distinctive delivery emphasizing the "b" (which he did intentionally, in place of more cumbersome alternatives such as "billions with a 'b'", in order to distinguish the word from "millions" in viewers' minds), made him a favorite target of comic performers, including Johnny Carson, Gary Kroeger, Mike Myers, Bronson Pinchot, Penn Jillette, Harry Shearer, and others. Frank Zappa satirized the line in the song "Be In My Video", noting as well "atomic light". Sagan took this all in good humor, and his final book was entitled ''Billions and Billions'' which opened with a tongue-in-cheek discussion of this catchphrase, observing that Carson himself was an amateur astronomer and that Carson's comic caricature often included real science.

The popular perception of his characterization of large cosmic quantities continued to be a sense of wonderment at the vastness of space and time, as in his phrase "The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth." However, this famous saying was widely misunderstood, as he was in fact referring to the world being at a "critical branch point in history" as in the following quote from ''Cosmos: A Personal Voyage'', Episode 8: "Journeys in Space and Time":

"Those worlds in space are as countless as all the grains of sand on all the beaches of the earth. Each of those worlds is as real as ours and every one of them is a succession of incidents, events, occurrences which influence its future. Countless worlds, numberless moments, an immensity of space and time. And our small planet at this moment, here we face a critical branch point in history: what we do with our world, right now, will propagate down through the centuries and powerfully affect the destiny of our descendants. It is well within our power to destroy our civilization and perhaps our species as well."

Sagan units

As a humorous tribute to him, a ''sagan'' has been defined as a unit of measurement equal to at least four billion, since the lower bound of a number conforming to the constraint of ''billions and billions'' must be two billion plus two billion.

Social concerns

Sagan believed that the Drake equation, on substitution of reasonable estimates, suggested that a large number of extraterrestrial civilizations would form, but that the lack of evidence of such civilizations highlighted by the Fermi paradox suggests technological civilizations tend to destroy themselves rather quickly. This stimulated his interest in identifying and publicizing ways that humanity could destroy itself, with the hope of avoiding such a cataclysm and eventually becoming a spacefaring species. Sagan's deep concern regarding the potential destruction of human civilization in a nuclear holocaust was conveyed in a memorable cinematic sequence in the final episode of ''Cosmos'', called "Who Speaks for Earth?" Sagan had already resigned from the Air Force Scientific Advisory Board and voluntarily surrendered his top secret clearance in protest over the Vietnam War. Following his marriage to his third wife (novelist Ann Druyan) in June 1981, Sagan became more politically active — particularly in opposing escalation of the nuclear arms race under President Ronald Reagan.

In March 1983, Reagan announced the Strategic Defense Initiative — a multi-billion dollar project to develop a comprehensive defense against attack by nuclear missiles, which was quickly dubbed the "Star Wars" program. Sagan spoke out against the project, arguing that it was technically impossible to develop a system with the level of perfection required, and far more expensive to build than for an enemy to defeat through decoys and other means — and that its construction would seriously destabilize the nuclear balance between the United States and the Soviet Union, making further progress toward nuclear disarmament impossible.

When Soviet leader Mikhail Gorbachev declared a unilateral moratorium on the testing of nuclear weapons, which would begin on August 6, 1985 — the 40th anniversary of the atomic bombing of Hiroshima — the Reagan administration dismissed the dramatic move as nothing more than propaganda, and refused to follow suit. In response, American anti-nuclear and peace activists staged a series of protest actions at the Nevada Test Site, beginning on Easter Sunday in 1986 and continuing through 1987. Hundreds of people were arrested, including Sagan, who was arrested on two separate occasions as he climbed over a chain-link fence at the test site.

Personal life and beliefs

Sagan was married three times — in 1957, to biologist Lynn Margulis, mother of Dorion Sagan and Jeremy Sagan; in 1968, to artist Linda Salzman, mother of Nick Sagan; and in 1981, to author Ann Druyan, mother of Alexandra Rachel (Sasha) Sagan and Samuel Democritus Sagan. His marriage to Druyan continued until his death in 1996.

Isaac Asimov described Sagan as one of only two people he ever met whose intellect surpassed his own. The other, he claimed, was the computer scientist and artificial intelligence expert Marvin Minsky.

Sagan wrote frequently about religion and the relationship between religion and science, expressing his skepticism about the conventional conceptualization of God as a sapient being. For example:

Some people think God is an outsized, light-skinned male with a long white beard, sitting on a throne somewhere up there in the sky, busily tallying the fall of every sparrow. Others — for example Baruch Spinoza and Albert Einstein — considered God to be essentially the sum total of the physical laws which describe the universe. I do not know of any compelling evidence for anthropomorphic patriarchs controlling human destiny from some hidden celestial vantage point, but it would be madness to deny the existence of physical laws.

In another description of his view of God, Sagan emphatically writes:

The idea that God is an oversized white male with a flowing beard who sits in the sky and tallies the fall of every sparrow is ludicrous. But if by God one means the set of physical laws that govern the universe, then clearly there is such a God. This God is emotionally unsatisfying... it does not make much sense to pray to the law of gravity.

Despite his criticism of religion, Sagan denied that he was an atheist, saying "An atheist has to know a lot more than I know. An atheist is someone who knows there is no god. By some definitions atheism is very stupid." In reply to a question in 1996 about his religious beliefs, Sagan answered, "I'm agnostic." Sagan maintained that the idea of a creator of the universe was difficult to prove or disprove and that the only conceivable scientific discovery that could challenge it would be an infinitely old universe. According to his last wife, Ann Druyan, he was not a believer: }}

In 2006, Ann Druyan edited Sagan's 1985 Glasgow ''Gifford Lectures in Natural Theology'' into a book, ''The Varieties of Scientific Experience: A Personal View of the Search for God'', in which he elaborates on his views of divinity in the natural world. Sagan is also widely regarded as a freethinker or skeptic; one of his most famous quotations, in ''Cosmos'', was, "Extraordinary claims require extraordinary evidence" (called the "Sagan Standard" by some). This was based on a nearly identical statement by fellow founder of the Committee for the Scientific Investigation of Claims of the Paranormal, Marcello Truzzi, "An extraordinary claim requires extraordinary proof." This idea originated with Pierre-Simon Laplace (1749–1827), a French mathematician and astronomer who said, "The weight of evidence for an extraordinary claim must be proportioned to its strangeness."

Late in his life, Sagan's books elaborated on his skeptical, naturalistic view of the world. In ''The Demon-Haunted World: Science as a Candle in the Dark'', he presented tools for testing arguments and detecting fallacious or fraudulent ones, essentially advocating wide use of critical thinking and the scientific method. The compilation ''Billions and Billions: Thoughts on Life and Death at the Brink of the Millennium'', published in 1997 after Sagan's death, contains essays written by Sagan, such as his views on abortion, and his widow Ann Druyan's account of his death as a skeptic, agnostic, and freethinker.

Sagan warned against humans' tendency towards anthropocentrism. He was the faculty adviser for the Cornell Students for the Ethical Treatment of Animals. In the ''Cosmos'' chapter "Blues For a Red Planet", Sagan wrote, "If there is life on Mars, I believe we should do nothing with Mars. Mars then belongs to the Martians, even if the Martians are only microbes."

Sagan was a user and advocate of marijuana. Under the pseudonym "Mr. X", he contributed an essay about smoking cannabis to the 1971 book ''Marihuana Reconsidered''. The essay explained that marijuana use had helped to inspire some of Sagan's works and enhance sensual and intellectual experiences. After Sagan's death, his friend Lester Grinspoon disclosed this information to Sagan's biographer, Keay Davidson. The publishing of the biography, ''Carl Sagan: A Life'', in 1999 brought media attention to this aspect of Sagan's life. Not long after his death, widow Ann Druyan had gone on to preside over the board of directors of NORML, a foundation dedicated to reforming cannabis laws.

In 1994, engineers at Apple Computer code-named the Power Macintosh 7100 "Carl Sagan" in the hope that Apple would make "billions and billions" with the sale of the PowerMac 7100. The name was only used internally, but Sagan was concerned that it would become a product endorsement and sent Apple a cease and desist letter. Apple complied, but engineers retaliated by changing the internal codename to "BHA" for "Butt-Head Astronomer". Sagan then sued Apple for libel, a form of defamation, in federal court. The court granted Apple's motion to dismiss Sagan's claims and opined in dicta that a reader aware of the context would understand Apple was "clearly attempting to retaliate in a humorous and satirical way", and that "It strains reason to conclude that Defendant was attempting to criticize Plaintiff's reputation or competency as an astronomer. One does not seriously attack the expertise of a scientist using the undefined phrase 'butt-head'." Sagan then sued for Apple's original use of his name and likeness, but again lost. Sagan appealed the ruling. In November 1995, an out of court settlement was reached and Apple's office of trademarks and patents released a conciliatory statement that "Apple has always had great respect for Dr. Sagan. It was never Apple's intention to cause Dr. Sagan or his family any embarrassment or concern."

Sagan briefly served as an adviser on Stanley Kubrick's film ''2001: A Space Odyssey''. Sagan proposed that the film would suggest, rather than depict, extraterrestrial superintelligence.

Sagan and UFOs

Sagan had some interest in UFO reports from at least 1964 when he had several conversations on the subject with Jacques Vallee. Though quite skeptical of any extraordinary answer to the UFO question, Sagan thought scientists should study the phenomenon, at least because there was widespread public interest in UFO reports.

Stuart Appelle notes that Sagan "wrote frequently on what he perceived as the logical and empirical fallacies regarding UFOs and the abduction experience. Sagan rejected an extraterrestrial explanation for the phenomenon but felt there were both empirical and pedagogical benefits for examining UFO reports and that the subject was, therefore, a legitimate topic of study."

In 1966, Sagan was a member of the Ad Hoc Committee to Review Project Blue Book, the U.S. Air Force's UFO investigation project. The committee concluded Blue Book had been lacking as a scientific study, and recommended a university-based project to give the UFO phenomenon closer scientific scrutiny. The result was the Condon Committee (1966–1968), led by physicist Edward Condon, and in their final report they formally concluded that UFOs, regardless of what any of them actually were, did not behave in a manner consistent with a threat to national security.

Ron Westrum writes that "The high point of Sagan's treatment of the UFO question was the AAAS's symposium in 1969. A wide range of educated opinions on the subject were offered by participants, including not only proponents such as James McDonald and J. Allen Hynek but also skeptics like astronomers William Hartmann and Donald Menzel. The roster of speakers was balanced, and it is to Sagan's credit that this event was presented in spite of pressure from Edward Condon". With physicist Thornton Page, Sagan edited the lectures and discussions given at the symposium; these were published in 1972 as ''UFOs: A Scientific Debate''. Some of Sagan's many books examine UFOs (as did one episode of ''Cosmos'') and he claimed a religious undercurrent to the phenomenon.

Sagan again revealed his views on interstellar travel in his 1980 ''Cosmos'' series. In one of his last written works, Sagan argued that the chances of extraterrestrial spacecraft visiting Earth are vanishingly small. However, Sagan did think it plausible that Cold War concerns contributed to governments misleading their citizens about UFOs, and that "some UFO reports and analyses, and perhaps voluminous files, have been made inaccessible to the public which pays the bills ... It's time for the files to be declassified and made generally available." He cautioned against jumping to conclusions about suppressed UFO data and stressed that there was no strong evidence that aliens were visiting the Earth either in the past or present.

Death

After a long and difficult fight with myelodysplasia, which included three bone marrow transplants, Sagan died of pneumonia at the age of 62 at the Fred Hutchinson Cancer Research Center in Seattle, Washington, on December 20, 1996. He was buried at Lakeview Cemetery in Ithaca, New York.

Posthumous recognition

The 1997 movie ''Contact'', based on Sagan's novel of the same name and finished after his death, ends with the dedication "For Carl".

In 1997, the Sagan Planet Walk was opened in Ithaca New York. It is a walking scale model of the solar system, extending 1.2 km from the center of The Commons in downtown Ithaca, NY, to the Sciencenter, a hands-on museum. The exhibition was created in memory of Carl Sagan, who was an Ithaca resident and Cornell Professor. Professor Sagan had been a founding member of the museum's advisory board.

The landing site of the unmanned Mars Pathfinder spacecraft was renamed the ''Carl Sagan Memorial Station'' on July 5, 1997.

Sagan's son, Nick Sagan, wrote several episodes in the ''Star Trek'' franchise. In an episode of ''Star Trek: Enterprise'' entitled "Terra Prime", a quick shot is shown of the relic rover Sojourner, part of the Mars Pathfinder mission, placed by a historical marker at Carl Sagan Memorial Station on the Martian surface. The marker displays a quote from Sagan: "Whatever the reason you're on Mars, I'm glad you're there, and I wish I was with you." Sagan's student Steve Squyres led the team that landed the Spirit Rover and Opportunity Rover successfully on Mars in 2004.

Asteroid 2709 Sagan is also named in his honor.

On November 9, 2001, on what would have been Sagan's 67th birthday, the NASA Ames Research Center dedicated the site for the Carl Sagan Center for the Study of Life in the Cosmos. "Carl was an incredible visionary, and now his legacy can be preserved and advanced by a 21st century research and education laboratory committed to enhancing our understanding of life in the universe and furthering the cause of space exploration for all time", said NASA Administrator Daniel Goldin. Ann Druyan was at the Center as it opened its doors on October 22, 2006.

Sagan has at least three awards named in his honor:

The Carl Sagan Memorial Award presented jointly since 1997 by the American Astronomical Society (AAS) and the Planetary Society,

The Carl Sagan Medal for Excellence in Public Communication in Planetary Science presented since 1998 by the American Astronomical Society's Division for Planetary Sciences (AAS/DPS) for outstanding communication by an active planetary scientist to the general public — Carl Sagan was one of the original organizing committee members of the DPS, and

The Carl Sagan Award for Public Understanding of Science presented by the Council of Scientific Society Presidents (CSSP) — Sagan himself was the first recipient of the CSSP award in 1993. In 2006, the Carl Sagan Medal was awarded to astrobiologist and author David Grinspoon, the son of Sagan's friend Lester Grinspoon.

On December 20, 2006, the tenth anniversary of Sagan's death, a blogger, Joel Schlosberg, organized a Carl Sagan "blog-a-thon" to commemorate Sagan's death, and the idea was supported by Nick Sagan. Many members of the blogging community participated.

August 2007 the Independent Investigative Group IIG awarded Sagan posthumously a Lifetime Achievement Award. This honor has also been awarded to Harry Houdini and James Randi.

In 2008, Benn Jordan, also known as "The Flashbulb", released the album ''Pale Blue Dot: A Tribute to Carl Sagan''.

In 2009, clips from Carl Sagan's ''Cosmos'' were used as the basis for ''A Glorious Dawn'', the first video produced for the Symphony of Science, an educational music video production by composer John Boswell. Musician Jack White later released this song as a vinyl single under his record label Third Man Records. Additional clips were used in several followup videos which featured Sagan alongside other noted scientists and proponents of rational thinking, such as Richard Dawkins, Richard Feynman, Brian Greene, Lawrence M. Krauss, Bill Nye, and Neil deGrasse Tyson.

In 2010, the 76th anniversary of Carl Sagan's birth, the second "Carl Sagan Day" was celebrated on November 6.

Awards and honors

Annual Award for Television Excellence — 1981 — The Ohio State University — PBS series ''Cosmos''

Apollo Achievement Award — National Aeronautics and Space Administration

NASA Distinguished Public Service Medal — National Aeronautics and Space Administration (twice)

Emmy — Outstanding Individual Achievement — 1981 — PBS series ''Cosmos''

Emmy — Outstanding Informational Series — 1981 — PBS series ''Cosmos''

Exceptional Scientific Achievement Medal — National Aeronautics and Space Administration

Helen Caldicott Leadership Award — Women's Action for Nuclear Disarmament

Hugo Award — 1981 — ''Cosmos''

Humanist of the Year — 1981 — Awarded by the American Humanist Association

In Praise of Reason Award — 1987 — Committee for the Scientific Investigation of Claims of the Paranormal

Isaac Asimov Award — 1994 — Committee for the Scientific Investigation of Claims of the Paranormal

John F. Kennedy Astronautics Award — American Astronautical Society

John W. Campbell Memorial Award — 1974 — ''Cosmic Connection: An Extraterrestrial Perspective''

Joseph Priestley Award — "For distinguished contributions to the welfare of mankind"

Klumpke-Roberts Award of the Astronomical Society of the Pacific — 1974

Konstantin Tsiolkovsky Medal — Awarded by the Soviet Cosmonauts Federation

Locus Award 1986 — ''Contact''

Lowell Thomas Award — Explorers Club — 75th Anniversary

Masursky Award — American Astronomical Society

Miller Research Fellowship — Miller Institute (1960–1962)

Oersted Medal — 1990 — American Association of Physics Teachers

Peabody Award — 1980 — PBS series ''Cosmos''

Prix Galbert — The international prize of Astronautics

Public Welfare Medal — 1994 — National Academy of Sciences

Pulitzer Prize for General Non-Fiction — 1978 — ''The Dragons of Eden''

SF Chronicle Award — 1998 — ''Contact''

Named the "99th Greatest American" on the June 5, 2005, ''Greatest American'' show on the Discovery Channel

Publications

''Planets'' (LIFE Science Library), Sagan, Carl, Jonathan Norton Leonard and editors of Life, Time, Inc., 1966

''Intelligent Life in the Universe'', I.S. Shklovskii coauthor, Random House, 1966, ISBN 1-892803-02-X, 509 pgs (note: republished in 1998 by Emerson-Adams Press)

''UFOs: A Scientific Debate'', Thornton Page coauthor, Cornell University Press, 1972, 310 pgs

''Communication with Extraterrestrial Intelligence''. MIT Press, 1973, 428 pgs

''Mars and the Mind of Man'', Sagan, Carl, et al., Harper & Row, 1973, 143 pgs

''Cosmic Connection: An Extraterrestrial Perspective'', Jerome Agel coauthor, Anchor Press, 1973, ISBN 0-521-78303-8, 301 pgs

''Other Worlds''. Bantam Books, 1975

''Murmurs of Earth: The Voyager Interstellar Record'', Sagan, Carl, et al., Random House, ISBN 0-394-41047-5, 1978

''The Dragons of Eden: Speculations on the Evolution of Human Intelligence''. Ballantine Books, 1978, ISBN 0-345-34629-7, 288 pgs

''Broca's Brain: Reflections on the Romance of Science''. Ballantine Books, 1979, ISBN 0-345-33689-5, 416 pgs

''Cosmos''. Random house, 1980. Random House New Edition, May 7, 2002, ISBN 0-375-50832-5, 384 pgs

''The Cold and the Dark: The World after Nuclear War'', Sagan, Carl et al., Sidgwick & Jackson, 1985

''Comet'', Ann Druyan coauthor, Ballantine Books, 1985, ISBN 0-345-41222-2, 496 pgs

''Contact''. Simon and Schuster, 1985; Reissued August 1997 by Doubleday Books, ISBN 1-56865-424-3, 352 pgs

''A Path Where No Man Thought: Nuclear Winter and the End of the Arms Race'', Richard Turco coauthor, Random House, 1990, ISBN 0-394-58307-8, 499 pgs

''Shadows of Forgotten Ancestors: A Search for Who We Are'', Ann Druyan coauthor, Ballantine Books, October 1993, ISBN 0-345-38472-5, 528 pgs

''Pale Blue Dot: A Vision of the Human Future in Space''. Random House, November 1994, ISBN 0-679-43841-6, 429 pgs

''The Demon-Haunted World: Science as a Candle in the Dark''. Ballantine Books, March 1996, ISBN 0-345-40946-9, 480 pgs (note: the book was first published and copyrighted in 1995 with an errata slip inserted)

''Billions and Billions: Thoughts on Life and Death at the Brink of the Millennium'', Ann Druyan coauthor, Ballantine Books, June 1997, ISBN 0-345-37918-7, 320 pgs

''The Varieties of Scientific Experience: A Personal View of the Search for God'', Carl Sagan (writer) & Ann Druyan (editor), 1985 Gifford lectures, Penguin Press HC, November 2006, ISBN 1-59420-107-2, 304 pgs

References

Further reading

External links

The Carl Sagan Portal

BBC Radio program "Great Lives" on Carl Sagan's life

A Man whose time Has come — Interview with Carl Sagan by Ian Ridpath, New Scientist 1974 July 4

Carl Sagan Prize for Science Popularization

Carl Sagan Medal for Excellence in Public Communication in Planetary Science, presented by the American Astronomical Society's Division for Planetary Sciences (AAS/DPS)

Carl Sagan Center for the Study of Life in the Universe, SETI Institute

Carl Sagan's Life and Legacy as Scientist, Teacher, and Skeptic, Committee for Skeptical Inquiry

Cosmos — Full Episodes and Clips streaming online for free — Hulu, Cosmos online for free

A Tribute to Carl Sagan: Our Place in the Universe, The Skeptics Society

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Name	Stephen Hawking
Birth name	Stephen William Hawking
Birth date	January 08, 1942
Birth place	Oxford, England, United Kingdom
Residence	United Kingdom
Nationality	British
Fields	Applied mathematicsTheoretical physicsCosmology
Workplaces	Cambridge UniversityCalifornia Institute of TechnologyPerimeter Institute for Theoretical Physics
Alma mater	Oxford UniversityCambridge University
Doctoral advisor	Dennis Sciama
Academic advisors	Robert Berman
Doctoral students	Bruce AllenRaphael BoussoFay DowkerMalcolm PerryBernard CarrGary GibbonsHarvey ReallDon PageTim PrestidgeRaymond LaflammeJulian Luttrell
Known for	Black holesTheoretical cosmologyQuantum gravityHawking radiation
Influences	Dikran TahtaAlbert Einstein
Awards
Spouse	Jane Hawking(m. 1965–1991, divorced)Elaine Mason(m. 1995–2006, divorced)
Signature	Hawkingsig.svg }}

Stephen William Hawking, CH, CBE, FRS, FRSA (born 8 January 1942) is a British theoretical physicist and cosmologist, whose scientific books and public appearances have made him an academic celebrity. He is an Honorary Fellow of the Royal Society of Arts, a lifetime member of the Pontifical Academy of Sciences, and in 2009 was awarded the Presidential Medal of Freedom, the highest civilian award in the United States.

Hawking was the Lucasian Professor of Mathematics at the University of Cambridge for 30 years, taking up the post in 1979 and retiring on 1 October 2009. He is now Director of Research at the Centre for Theoretical Cosmology in the Department of Applied Mathematics and Theoretical Physics at the University of Cambridge. He is also a Fellow of Gonville and Caius College, Cambridge and a Distinguished Research Chair at the Perimeter Institute for Theoretical Physics in Waterloo, Ontario. He is known for his contributions to the fields of cosmology and quantum gravity, especially in the context of black holes. He has also achieved success with works of popular science in which he discusses his own theories and cosmology in general; these include the runaway best seller ''A Brief History of Time'', which stayed on the British ''Sunday Times'' best-sellers list for a record-breaking 237 weeks.

Hawking's key scientific works to date have included providing, with Roger Penrose, theorems regarding gravitational singularities in the framework of general relativity, and the theoretical prediction that black holes should emit radiation, which is today known as Hawking radiation (or sometimes as Bekenstein–Hawking radiation).

Hawking has a motor neurone disease that is related to amyotrophic lateral sclerosis, a condition that has progressed over the years and has left him almost completely paralysed.

Early life

Stephen Hawking was born on 8 January 1942 to Dr. Frank Hawking, a research biologist, and Isobel Hawking. He had two younger sisters, Philippa and Mary, and an adopted brother, Edward. Though Hawking's parents were living in North London, they moved to Oxford while his mother was pregnant with Stephen, desiring a safer location for the birth of their first child. (London was under attack at the time by the Luftwaffe.) According to Hawking, a German V-2 missile struck only a few streets away.

After Hawking was born, the family moved back to London, where his father headed the division of parasitology at the National Institute for Medical Research. In 1950, Hawking and his family moved to St Albans, Hertfordshire, where he attended St Albans High School for Girls from 1950 to 1953. (At that time, boys could attend the Girls' school until the age of ten.) From the age of eleven, he attended St Albans School, where he was a good, but not exceptional, student. When asked later to name a teacher who had inspired him, Hawking named his mathematics teacher Dikran Tahta. He maintains his connection with the school, giving his name to one of the four houses and to an extracurricular science lecture series. He has visited it to deliver one of the lectures and has also granted a lengthy interview to pupils working on the school magazine, ''The Albanian''.

Hawking was always interested in science. Inspired by his mathematics teacher, he originally wanted to study the subject at university. However, Hawking's father wanted him to apply to University College, Oxford, where his father had attended. As University College did not have a mathematics fellow at that time, it would not accept applications from students who wished to read that discipline. Hawking therefore applied to read natural sciences, in which he gained a scholarship. Once at University College, Hawking specialised in physics. His interests during this time were in thermodynamics, relativity, and quantum mechanics. His physics tutor, Robert Berman, later said in ''The New York Times Magazine'':

Hawking was passing, but his unimpressive study habits resulted in a final examination score on the borderline between first and second class honours, making an "oral examination" necessary. Berman said of the oral examination:

After receiving his B.A. degree at Oxford in 1962, he stayed to study astronomy. He decided to leave when he found that studying sunspots, which was all the observatory was equipped for, did not appeal to him and that he was more interested in theory than in observation. He left Oxford for Trinity Hall, Cambridge, where he engaged in the study of theoretical astronomy and cosmology.

Career

Almost as soon as he arrived at Cambridge, he started developing symptoms of amyotrophic lateral sclerosis (ALS, known colloquially in the United States as Lou Gehrig's disease), a type of motor neurone disease which would cost him almost all neuromuscular control. During his first two years at Cambridge, he did not distinguish himself, but, after the disease had stabilised and with the help of his doctoral tutor, Dennis William Sciama, he returned to working on his PhD.

Hawking was elected as one of the youngest Fellows of the Royal Society in 1974, was created a Commander of the Order of the British Empire in 1982, and became a Companion of Honour in 1989. Hawking is a member of the Board of Sponsors of the ''Bulletin of the Atomic Scientists''.

In 1974, he accepted the Sherman Fairchild Distinguished Scholar visiting professorship at the California Institute of Technology (Caltech) to work with his friend, Kip Thorne, who was a faculty member there. He continues to have ties with Caltech, spending a month each year there since 1992.

Hawking's achievements were made despite the increasing paralysis caused by the ALS. By 1974, he was unable to feed himself or get out of bed. His speech became slurred so that he could be understood only by people who knew him well. In 1985, he caught pneumonia and had to have a tracheotomy, which made him unable to speak at all. A Cambridge scientist built a device that enables Hawking to write onto a computer with small movements of his body, and then have a voice synthesiser speak what he has typed.

Research fields

Hawking's principal fields of research are theoretical cosmology and quantum gravity.

In the late 1960s, he and his Cambridge friend and colleague, Roger Penrose, applied a new, complex mathematical model they had created from Albert Einstein's theory of general relativity. This led, in 1970, to Hawking proving the first of many singularity theorems; such theorems provide a set of sufficient conditions for the existence of a gravitational singularity in space-time. This work showed that, far from being mathematical curiosities which appear only in special cases, singularities are a fairly generic feature of general relativity.

He supplied a mathematical proof, along with Brandon Carter, Werner Israel and D. Robinson, of John Wheeler's no-hair theorem – namely, that any black hole is fully described by the three properties of mass, angular momentum, and electric charge.

Hawking also suggested upon analysis of gamma ray emissions that after the Big Bang, primordial mini black holes were formed. With Bardeen and Carter, he proposed the four laws of black hole mechanics, drawing an analogy with thermodynamics. In 1974, he calculated that black holes should thermally create and emit subatomic particles, known today as Bekenstein-Hawking radiation, until they exhaust their energy and evaporate.

In collaboration with Jim Hartle, Hawking developed a model in which the universe had no boundary in space-time, replacing the initial singularity of the classical Big Bang models with a region akin to the North Pole: one cannot travel north of the North Pole, as there is no boundary. While originally the no-boundary proposal predicted a closed universe, discussions with Neil Turok led to the realisation that the no-boundary proposal is also consistent with a universe which is not closed.

Along with Thomas Hertog at CERN, in 2006 Hawking proposed a theory of "top-down cosmology," which says that the universe had no unique initial state, and therefore it is inappropriate for physicists to attempt to formulate a theory that predicts the universe's current configuration from one particular initial state. Top-down cosmology posits that in some sense, the present "selects" the past from a superposition of many possible histories. In doing so, the theory suggests a possible resolution of the fine-tuning question: It is inevitable that we find our universe's present physical constants, as the current universe "selects" only those past histories that led to the present conditions. In this way, top-down cosmology provides an anthropic explanation for why we find ourselves in a universe that allows matter and life, without invoking an ensemble of multiple universes.

Hawking's many other scientific investigations have included the study of quantum cosmology, cosmic inflation, helium production in anisotropic Big Bang universes, large N cosmology, the density matrix of the universe, topology and structure of the universe, baby universes, Yang-Mills instantons and the S matrix, anti de Sitter space, quantum entanglement and entropy, the nature of space and time, including the arrow of time, spacetime foam, string theory, supergravity, Euclidean quantum gravity, the gravitational Hamiltonian, Brans-Dicke and Hoyle-Narlikar theories of gravitation, gravitational radiation, and wormholes.

At a George Washington University lecture in honour of NASA's fiftieth anniversary, Hawking theorised on the existence of extraterrestrial life, believing that "primitive life is very common and intelligent life is fairly rare."

Losing an old bet

Hawking was in the news in July 2004 for presenting a new theory about black holes which goes against his own long-held belief about their behaviour, thus losing a bet he made with Kip Thorne and John Preskill of Caltech. Classically, it can be shown that information crossing the event horizon of a black hole is lost to our universe, and that thus all black holes are identical beyond their mass, electrical charge and angular velocity (the "no hair theorem"). The problem with this theorem is that it implies the black hole will emit the same radiation regardless of what goes into it, and as a consequence that if a pure quantum state is thrown into a black hole, an "ordinary" mixed state will be returned. This runs counter to the rules of quantum mechanics and is known as the black hole information paradox.

Human spaceflight

At the fiftieth anniversary of NASA in 2008, Hawking gave a keynote speech on the final frontier exhorting and inspiring the space technology community on why we (the human race) explore space.

At the celebration of his sixty-fifth birthday on 8 January 2007, Hawking announced his plan to take a zero-gravity flight in 2007 to prepare for a sub-orbital spaceflight in 2009 on Virgin Galactic's space service. Billionaire Richard Branson pledged to pay all expenses for the latter, costing an estimated £100,000. Stephen Hawking's zero-gravity flight in a "''Vomit Comet''" of Zero Gravity Corporation, during which he experienced weightlessness eight times, took place on 26 April 2007. He became the first quadriplegic to float in zero-gravity. This was the first time in forty years that he moved freely, without his wheelchair. The fee is normally US$3,750 for 10–15 plunges, but Hawking was not required to pay the fee. A bit of a futurist, Hawking was quoted before the flight saying: }} In an interview with ''The Daily Telegraph'', he suggested that space was the Earth's long term hope. He continued this theme at a 2008 Charlie Rose interview.

Existence and nature of extraterrestrial life

Hawking has indicated that he is almost certain that alien life exists in other parts of the universe and uses a mathematical basis for his assumptions. "To my mathematical brain, the numbers alone make thinking about aliens perfectly rational. The real challenge is to work out what aliens might actually be like." He believes alien life not only certainly exists on planets but perhaps even in other places, like within stars or even floating in outer space. He also warns that a few of these species might be intelligent and threaten Earth. Contact with such species might be devastating for humanity. "If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans," he said. He advocated that, rather than try to establish contact, humans should try to avoid contact with alien life forms.

Illness

Stephen Hawking is severely disabled by a motor neurone disease known as Amyotrophic lateral sclerosis (ALS), sometimes known as Lou Gehrig's disease. Hawking's illness is markedly different from typical ALS because if confirmed, Hawking's case would make for the most protracted case ever documented. A survival for more than ten years after diagnosis is uncommon for ALS; the longest documented durations, other than Hawking's, are 32 and 39 years and these cases were termed benign because of the lack of the typical progressive course.

When he was young, he enjoyed riding horses. At Oxford, he coxed a rowing team, which, he stated, helped relieve his immense boredom at the university. Symptoms of the disorder first appeared while he was enrolled at University of Cambridge; he lost his balance and fell down a flight of stairs, hitting his head. Worried that he would lose his genius, he took the Mensa test to verify that his intellectual abilities were intact. The diagnosis of motor neurone disease came when Hawking was 21, shortly before his first marriage, and doctors said he would not survive more than two or three years. Hawking gradually lost the use of his arms, legs, and voice, and as of 2009 has been almost completely paralysed.

During a visit to the research centre CERN in Geneva in 1985, Hawking contracted pneumonia, which in his condition was life-threatening as it further restricted his already limited respiratory capacity. He had an emergency tracheotomy, and as a result lost what remained of his ability to speak. He has since used an electronic voice synthesiser to communicate.

The DECtalk DTC01 voice synthesiser he uses, which has an American English accent, is no longer being produced. Asked why he has still kept it after so many years, Hawking mentioned that he has not heard a voice he likes better and that he identifies with it. Hawking is said to be looking for a replacement since, aside from being obsolete, the synthesiser is both large and fragile by current standards. As of mid 2009, he was said to be using NeoSpeech's VoiceText speech synthesiser.

In Hawking's many media appearances, he appears to speak fluently through his synthesiser, but in reality, it is a tedious drawn-out process. Hawking's setup uses a predictive text entry system, which requires only the first few characters in order to auto-complete the word, but as he is only able to use his cheek for data entry, constructing complete sentences takes time. His speeches are prepared in advance, but having a live conversation with him provides insight as to the complexity and work involved. During a TED Conference talk, it took him seven minutes to answer a question.

He describes himself as lucky, despite his disease. Its slow progression has allowed him time to make influential discoveries and has not hindered him from having, in his own words, "a very attractive family." When his wife, Jane, was asked why she decided to marry a man with a three-year life expectancy, she responded, "Those were the days of atomic gloom and doom, so we all had a rather short life expectancy." On 20 April 2009, Cambridge University released a statement saying that Hawking was "very ill" with a chest infection, and was admitted to Addenbrooke's Hospital. The following day, it was reported that his new condition was "comfortable" and he would make a full recovery from the infection.

As popular science advocate

Hawking has played himself on numerous television shows and has been portrayed in many more. He has played himself on a ''Red Dwarf'' anniversary special, played a hologram of himself on the episode "Descent" of ''Star Trek: The Next Generation'', appeared in a skit on ''Late Night with Conan O'Brien'', and appeared on the Discovery Channel special ''Alien Planet''. He has also played himself in several episodes of ''The Simpsons'' and ''Futurama'', and has had an action figure made of his ''Simpsons'' likeness. In 2008, Hawking was the subject of and featured in the documentary series ''Stephen Hawking, Master of the Universe'' for Channel 4. In September 2008, Hawking presided over the unveiling of the 'Chronophage' (time-eating) Corpus Clock at Corpus Christi College Cambridge. His actual synthesiser voice was used on parts of the Pink Floyd song "Keep Talking" from the 1994 album ''The Division Bell'', as well as on Turbonegro's "Intro: The Party Zone" on their 2005 album ''Party Animals'', Wolfsheim's "Kein Zurück (Oliver Pinelli Mix)".

Recognition

Acclaim

On 19 December 2007, a statue of Hawking by renowned late artist Ian Walters was unveiled at the Centre for Theoretical Cosmology, University of Cambridge. In May 2008, the statue of Hawking was unveiled at the African Institute for Mathematical Sciences in Cape Town. The Stephen W. Hawking Science Museum in San Salvador, El Salvador is named in honour of Stephen Hawking, citing his scientific distinction and perseverance in dealing with adversity. Stephen Hawking Building in Cambridge opened on 17 April 2007. The building belongs to Gonville and Caius College and is used as an undergraduate accommodation and conference facility.

Distinctions

Hawking's belief that the lay person should have access to his work led him to write a series of popular science books in addition to his academic work. The first of these, ''A Brief History of Time'', was published on 1 April 1988 by Hawking, his family and friends, and some leading physicists. It surprisingly became a best-seller and was followed by ''The Universe in a Nutshell'' (2001). Both books have remained highly popular all over the world. A collection of essays titled ''Black Holes and Baby Universes'' (1993) was also popular. His book, ''A Briefer History of Time'' (2005), co-written by Leonard Mlodinow, aims to update his earlier works and make them accessible to an even wider audience. In 2007 Hawking and his daughter, Lucy Hawking, published ''George's Secret Key to the Universe'', a children's book focusing on science that has been described as "like ''Harry Potter'', but without the magic." The book includes information on Hawking radiation.

Hawking supports the children's charity SOS Children's Villages UK.

Awards and honours

1975 Eddington Medal

1976 Hughes Medal of the Royal Society

1979 Albert Einstein Medal

1981 Franklin Medal

1982 Order of the British Empire (Commander)

1985 Gold Medal of the Royal Astronomical Society

1986 Member of the Pontifical Academy of Sciences

1988 Wolf Prize in Physics

1989 Prince of Asturias Awards in Concord

1989 Companion of Honour

1999 Julius Edgar Lilienfeld Prize of the American Physical Society

2003 Michelson Morley Award of Case Western Reserve University

2006 Copley Medal of the Royal Society 2008 Fonseca Prize of the University of Santiago de Compostela 2009 Presidential Medal of Freedom, the highest civilian honour in the United States

Personal life

Hawking revealed that he did not see much point in obtaining a doctorate if he were to die soon. Hawking later said that the real turning point was his 1965 marriage to Jane Wilde, a language student. After gaining his PhD at Trinity Hall, he became first a Research Fellow, and later on a Professorial Fellow at Gonville and Caius College. Jane Hawking (née Wilde), Hawking's first wife, cared for him until 1991 when the couple separated, reportedly because of the pressures of fame and his increasing disability. They had three children: Robert, Lucy, and Timothy. Hawking then married his nurse, Elaine Mason (who was previously married to David Mason, the designer of the first version of Hawking's talking computer), in 1995. In October 2006, Hawking filed for divorce from his second wife amid claims by former nurses that she had abused him.

In 1999, Jane Hawking published a memoir, ''Music to Move the Stars'', detailing the marriage and his breakdown; in 2010 she published a revised version, ''Travelling to Infinity, My Life with Stephen''. Hawking's daughter, Lucy, is a novelist. Their oldest son, Robert, emigrated to the United States, married, and has a son. After a period of estrangement, Hawking and his first family were reconciled in 2007.

His view on how to live life is to "seek the greatest value of our action".

Hawking was asked about his IQ in a 2004 newspaper interview, and replied, "I have no idea. People who boast about their I.Q. are losers." Yet when asked "Are you saying you are not a genius?", Hawking replied "I hope I'm near the upper end of the range."

Hawking strongly opposed the US-led Iraq War, calling it "a war crime" and "based on lies". In 2004, he personally attended a demonstration against the war in Trafalgar Square, and participated in a public reading of the names of Iraqi war victims.

Religious views

In his early work, Hawking spoke of "God" in a metaphorical sense, such as in ''A Brief History of Time'': "If we discover a complete theory, it would be the ultimate triumph of human reason—for then we should know the mind of God." In the same book he suggested the existence of God was unnecessary to explain the origin of the universe. His 2010 book ''The Grand Design'' and interviews with the ''Telegraph'' and the Channel 4 documentary ''Genius of Britain'', clarify that he does "not believe in a personal God". Hawking writes, "The question is: is the way the universe began chosen by God for reasons we can't understand, or was it determined by a law of science? I believe the second." He adds, "Because there is a law such as gravity, the Universe can and will create itself from nothing."

His ex-wife, Jane, said during their divorce proceedings that he was an atheist. Hawking has stated that he is "not religious in the normal sense" and he believes that "the universe is governed by the laws of science. The laws may have been decreed by God, but God does not intervene to break the laws." In an interview published in ''The Guardian'' newspaper, Hawking regarded the concept of Heaven as a myth, stating that there is "no heaven or afterlife" and that such a notion was a "fairy story for people afraid of the dark."

Hawking contrasted religion and science in 2010, saying: "There is a fundamental difference between religion, which is based on authority, [and] science, which is based on observation and reason. Science will win because it works."

Selected publications

Technical

''Singularities in Collapsing Stars and Expanding Universes'' with Dennis William Sciama, 1969 Comments on Astrophysics and Space Physics Vol 1 No.1

''The Large Scale Structure of Space-Time'' with George Ellis, 1973, ISBN 0-521-09906-4

''The Nature of Space and Time'' with Roger Penrose, foreword by Michael Atiyah, New Jersey: Princeton University Press, 1996, ISBN 0-691-05084-8

''The Large, the Small, and the Human Mind'', (with Abner Shimony, Nancy Cartwright, and Roger Penrose), Cambridge University Press, 1997, ISBN 0-521-56330-5 (hardback), ISBN 0-521-65538-2 (paperback), Canto edition: ISBN 0-521-78572-3

''Information Loss in Black Holes'', Cambridge University Press, 2005

''God Created the Integers: The Mathematical Breakthroughs That Changed History'', Running Press, 2005 ISBN 0762419229

Popular

''A Brief History of Time'', (Bantam Press 1988) ISBN 055305340X

''Black Holes and Baby Universes and Other Essays'', (Bantam Books 1993) ISBN 0553374117

''The Universe in a Nutshell'', (Bantam Press 2001) ISBN 055380202X

''On The Shoulders of Giants. The Great Works of Physics and Astronomy'', (Running Press 2002) ISBN 076241698X

''A Briefer History of Time'', coauthored with Leonard Mlodinow, (Bantam Books 2005) ISBN 0553804367

''The Grand Design'', coauthored with Leonard Mlodinow, (Bantam Press 2010) ISBN 0553805371

Children's fiction

These are co-written with his daughter Lucy.

''George's Secret Key to the Universe'', (Random House, 2007) ISBN 9780385612708

''George's Cosmic Treasure Hunt'', (Simon & Schuster, 2009) ISBN 9781416986713

Films and series

''A Brief History of Time'' (1991)

''Stephen Hawking's Universe'' (1997)

''Horizon: The Hawking Paradox'' (2005)

''Masters of Science Fiction'' (2007)

''Stephen Hawking: Master of the Universe'' (2008) ''Into The Universe with Stephen Hawking'' (2010) A list of Hawking's publications through the year 2002 is available on his website.

See also

Basic concepts of quantum mechanics

Many-worlds interpretation, or flexiverse

Susskind–Hawking battle – see Black hole information paradox

References

Further reading

A layman's guide to Stephen Hawking

Ferguson, Kitty (1991). ''Stephen Hawking: Quest For A Theory of Everything''. Franklin Watts. ISBN 0-553-29895-X

Highly influential in the field. A much cited centennial survey.

Pickover, Clifford, ''Archimedes to Hawking: Laws of Science and the Great Minds Behind Them'', Oxford University Press, 2008, ISBN 978-0195336115

External links

Stephen Hawking's web site

Stephen Hawking's page on Academia.edu

The Life of Stephen Hawking – slideshow by ''The First Post''

Video: Stephen Hawking – discussion of two views of the universe

Videos: Stephen Hawking's concept of God, The role of God within the no boundary cosmology and Imaginary time

;Dated

Stephen Hawking says universe not created by God

Public Lectures, including debate with Roger Penrose 1996–2006

''Hawking celebrates own brief history'', 7 January 2002, BBC

"Leaping the Abyss", interview in ''Reason'' by Gregory Benford 2002-04-01

2002-03-24

''Black holes turned "inside out"'', 22 July 2004, BBC

''Return of the time lord'', Interview about "A Brief History of Time", 27 September 2005, The Guardian.

Stephen Hawking touches on God and science – Physicist says Pope John Paul told scientists not to study universe's origins msnbc June 2006

Press Release from the Catholic League on misquote of Pope by Hawking 2006-06-16

BBC interview 2008-12-05

Category:1942 births Category:Academics of the University of Cambridge Category:Adams Prize recipients Category:Albert Einstein Medal recipients Category:Alumni of Trinity Hall, Cambridge Category:Alumni of University College, Oxford Category:Calculating prodigies Category:Commanders of the Order of the British Empire Category:Cosmologists Category:English astronomers Category:English theoretical physicists Category:English science writers Category:Fellows of Gonville and Caius College, Cambridge Category:Fellows of the Royal Society Category:People educated at St Albans School, Hertfordshire Category:Honorary Fellows of University College, Oxford Category:Living people Category:Lucasian Professors of Mathematics Category:Members of the Department of Applied Mathematics and Theoretical Physics Category:Members of the United States National Academy of Sciences Category:Members of the Order of the Companions of Honour Category:Members of the Pontifical Academy of Sciences Category:People from Oxford Category:People from St Albans Category:People with motor neurone disease Category:Presidential Medal of Freedom recipients Category:Recipients of the Copley Medal Category:Recipients of the Gold Medal of the Royal Astronomical Society Category:Religious skeptics Category:Wolf Prize in Physics laureates Category:20th-century philosophers Category:21st-century philosophers Category:People educated at St Albans High School for Girls

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