Life on Mars

For centuries people have speculated about the possibility of life on Mars due to the planet's proximity and similarity to Earth. Although there has been much speculation, to date there has never been any proof of life existing on Mars. However, cumulative evidence is now building that Mars once was habitable.

Serious searches for evidence of life began in the 19th century, and they continue today via telescopic investigations and landed missions. While early work focused on phenomenology and bordered on fantasy, modern scientific inquiry has emphasized the search for water, chemical biosignatures in the soil and rocks at the planet's surface, and biomarker gases in the atmosphere.

Mars is of particular interest for the study of the origins of life because of its similarity to the early Earth. This is especially so since Mars has a cold climate and lacks plate tectonics or continental drift, so it has remained almost unchanged since the end of the Hesperian period. At least two thirds of Mars's surface is more than 3.5 billion years old, and Mars may thus hold the best record of the prebiotic conditions leading to abiogenesis, even if life does not or has never existed there. It remains an open question whether life currently exists on Mars or has existed there in the past, and fictional Martians have been a recurring feature of popular entertainment of the 20th and 21st centuries.

David

David (/ˈdeɪvɪd/; Hebrew: דָּוִד, Modern David, Tiberian Dāwîḏ;ISO 259-3 Dawid; Arabic: داوُد‎ Dāwūd; Syriac: ܕܘܝܕ‎ Dawid; Ancient Greek: Δαυίδ; Latin: Davidus, David; Strong's: Daveed) was, according to the Books of Samuel, the second king of the United Kingdom of Israel, and according to the New Testament, an ancestor of Jesus. His life is conventionally dated to c. 1040 – 970 BCE, his reign over Judah c. 1010–970 BCE.

The Books of Samuel, 1 Kings, and 1 Chronicles are the only Old Testament sources of information on David, although the Tel Dan Stele (dated c. 850–835 BCE) contains the phrase בית דוד (bytdwd), read as "House of David", which many scholars confirm to be a likely plausible match to the existence in the mid-9th century BCE of a Judean royal dynasty called the House of David.

Depicted as a valorous warrior of great renown, and a poet and musician credited for composing much of the psalms contained in the Book of Psalms, King David is widely viewed as a righteous and effective king in battle and civil justice. He is described as a man after God's own heart in 1 Samuel 13:14 and Acts 13:22.

David Bowie

David Robert Jones (8 January 1947 – 10 January 2016), known as David Bowie (/ˈboʊ.i/), was an English singer, songwriter, multi-instrumentalist, record producer, painter, and actor. He was a figure in popular music for over five decades, and was considered by critics and musicians as an innovator, particularly for his work in the 1970s. His career was marked by reinvention and visual presentation, and his music and stagecraft significantly impacted popular music. During his lifetime, he sold an estimated 140 million records worldwide. In the UK, he was awarded nine platinum album certifications, eleven gold and eight silver, and released eleven number-one albums. In the US, he received five platinum and seven gold certifications. He was inducted into the Rock and Roll Hall of Fame in 1996.

Jimmy Fallon

James Thomas "Jimmy" Fallon (born September 19, 1974) is an American comedian, television host, actor, singer, writer, and producer. He is known for his work in television as a cast member on Saturday Night Live and as the host of late-night talk show The Tonight Show Starring Jimmy Fallon. He was born in Bay Ridge, Brooklyn and raised in Saugerties, New York. He grew up with an interest in comedy and music, moving to Los Angeles at 21 to pursue stand-up opportunities.

He was commissioned to join NBC's Saturday Night Live as a cast member in 1998, fulfilling a lifelong dream. Fallon remained on SNL for six years between 1998 and 2004, co-hosting the program's Weekend Update segment and becoming a celebrity in the process. He left the program for the film industry, starring in films such as Taxi (2004) and Fever Pitch (2005). Following his film career, Fallon returned to television as the host of Late Night with Jimmy Fallon on NBC in 2009, where he became well known for his emphasis on music and games. He transitioned from that program to become the sixth host of the long-running The Tonight Show in 2014.

The Tonight Show

The Tonight Show is an American late-night talk show broadcast from the Rockefeller Center in New York City and airing on NBC since 1954. It is the world's longest-running talk show, and the longest running, regularly scheduled entertainment program in the United States. It is the third-longest-running show on NBC, after only the news-and-talk shows Today and Meet the Press.

Over the course of more than 60 years, The Tonight Show has undergone only minor title changes. It aired under the name Tonight for several of its early years, eventually settling on The Tonight Show after the seating of long-time host Johnny Carson in 1962. In later decades, network programmers, advertisers, and the show's announcers would refer to the show by including the name of the host; for example, it is currently announced as The Tonight Show Starring Jimmy Fallon. In 1957, the show briefly tried a more news-style format. It has otherwise remained a talk show throughout its run.

The Tonight Show began broadcasting in 1954. It has had six official hosts, beginning with Steve Allen (1954–57), followed by Jack Paar (1957–62), Johnny Carson (1962–92), Jay Leno (1992–2009, 2010–14), Conan O'Brien (2009–10), and Jimmy Fallon (2014–present). It has had several recurring guest hosts, a practice especially common during the Paar and Carson eras.