Water, Rabbit, and Deer: three of the 20 day symbols in the Aztec calendar, from the Aztec calendar stone.

A day is a unit of time, commonly defined as an interval equal to 24 hours.^[1] It also can mean that portion of the full day during which a location is illuminated by the light of the sun, also known as daytime. The period of time measured from local noon to the following local noon is called a solar day.^[2][3]

Several definitions of this universal human concept are used according to context, need and convenience. In 1967, the second was redefined in terms of the wavelength of light, and it became the SI base unit of time. The unit of measurement for time called "day", redefined in 1967 as 86,400 SI seconds and symbolized d, is not an SI unit, but it is accepted for use with SI.^[1] A civil day is usually also 86,400 seconds, plus or minus a possible leap second in Coordinated Universal Time UTC, and, in some locations, occasionally plus or minus an hour when changing from or to daylight saving time. The word day may also refer to a day of the week or to a calendar date, as in answer to the question "On which day?" Day also refers to the part of the day that is not night — also known as 'daytime'. The life patterns of humans and many other species are related to Earth's solar day and the cycle of day and night (see circadian rhythms).

The average length of a solar day on Earth is about 86,400 seconds (24 hours) and there are about 365.2422 solar days in one mean tropical year. Because celestial orbits are not perfectly circular, and thus objects travel at different speeds at various positions in their orbit, a solar day is not the same length of time throughout the orbital year. A day, understood as the span of time it takes for the Earth to make one entire rotation^[4] with respect to the celestial background or a distant star (assumed to be fixed), is called stellar day. This period of rotation is about 4 minutes less than 24 hours and there are about 366.2422 in one mean tropical year (one more stellar day than the number of solar days). Mainly due to tidal effects, the Earth's rotational period is not constant, resulting in further minor variations for both solar days and stellar 'days'. Other planets and moons also have stellar and solar days.

Introduction[link]

Dagr, the Norse god of the day, rides his horse in this 19th-century painting by Peter Nicolai Arbo.

Besides the day of 24 hours (86,400 seconds), the word day is used for several different spans of time based on the rotation of the Earth around its axis. An important one is the solar day, defined as the time it takes for the sun to return to the zenith (its highest point in the sky). Because the Earth orbits the Sun elliptically as the Earth spins on an inclined axis, this period can be up to 7.9 seconds more than (or less than) 24 hours. On average over the year this day is equivalent to 24 hours (86,400 seconds).

A day, in the sense of daytime that is distinguished from night-time, is commonly defined as the period during which sunlight directly reaches the ground, assuming that there are no local obstacles. The length of daytime averages slightly more than half of the 24-hour day. Two effects make daytime on average longer than nights. The Sun is not a point, but has an apparent size of about 32 minutes of arc. Additionally, the atmosphere refracts sunlight in such a way that some of it reaches the ground even when the Sun is below the horizon by about 34 minutes of arc. So the first light reaches the ground when the centre of the Sun is still below the horizon by about 50 minutes of arc. The difference in time depends on the angle at which the Sun rises and sets (itself a function of latitude), but can amount to around seven minutes.

Ancient custom has a new day start at either the rising or setting of the Sun on the local horizon (Italian reckoning, for example) The exact moment of, and the interval between, two sunrises or two sunsets depends on the geographical position (longitude as well as latitude), and the time of year. This is the time as indicated by ancient hemispherical sundials.

A more constant day can be defined by the Sun passing through the local meridian, which happens at local noon (upper culmination) or midnight (lower culmination). The exact moment is dependent on the geographical longitude, and to a lesser extent on the time of the year. The length of such a day is nearly constant (24 hours ± 30 seconds). This is the time as indicated by modern sundials.

A further improvement defines a fictitious mean Sun that moves with constant speed along the celestial equator; the speed is the same as the average speed of the real Sun, but this removes the variation over a year as the Earth moves along its orbit around the Sun (due to both its velocity and its axial tilt).

The Earth's day has increased in length over time. This phenomenon is due to tides raised by the Moon which slow Earth's rotation. Because of the way the second is defined, the mean length of a day is now about 86,400.002 seconds, and is increasing by about 1.7 milliseconds per day every century ( an average over the last 2,700 years. See tidal acceleration for details. The length of one day has been estimated as 21.9 hours 620 million years ago from rhythmites (alternating layers in sandstone). The length of day for the Earth or Proto-Earth before the event which created our moon by an impact is yet unknown.

Etymology[link]

The term comes from the Old English dæg, with its cognates such as Tag in German, and dag in Norwegian, Danish, Swedish and Dutch. "Day" is the 98th most common word in English according to AskOxford.com.^{[citation needed]}

International System of Units (SI)[link]

A day, symbol d, is defined as 86,400 seconds. The second is the unit of time in SI units.

A day on the UTC time scale can include a negative or positive leap second, and can therefore have a length of 86,399 or 86,401 seconds.

The International Bureau of Weights and Measures (BIPM) currently defines a second as

… the duration of 9 192 631 770 periods of the radiation corresponding to the transition between two hyperfine levels of the ground state of the caesium 133 atom.^[5]

This makes the SI-based day last exactly 794,243,384,928,000 of those periods.

Decimal and metric time[link]

In the 19th century it had also been suggested to make a decimal fraction (¹⁄_10,000 or ¹⁄_100,000) of an astronomic day the base unit of time. This was an afterglow of decimal time and calendar, which had been given up already for its difficulty to comply with familiar units. The still most successful candidate is the centiday = 14.4 minutes, as a shorter quarter of an hour and also close to the SI target kilosecond and old Chinese ke.

Astronomy[link]

A day of exactly 86,400 SI seconds is the astronomical unit of time (the second is not preferred in astronomy).^[6]

For a given planet, there are three types of day defined in astronomy:

• stellar day - an entire rotation of a planet with respect to the distant stars
• sidereal day - a single rotation of a planet with respect to the vernal equinox
• mean solar day - average time of a single rotation of a planet with respect to the sun as the central star

For Earth, the stellar day and the sidereal day are nearly of the same length and about 3 minutes 56 seconds shorter than the solar day. Relative to the fixed stars, the Earth spins just over 366 times upon its axis during one complete orbit. The Earth's orbit around the Sun reduces (by one) the number of transits the Sun makes across the Earth's sky in a sidereal year.

Colloquial[link]

The word refers to various relatedly defined ideas, including the following:

• 24 hours (exactly)
• the period of light when the Sun is above the local horizon (that is, the time period from sunrise to sunset);
• the full day covering a dark and a light period, beginning from the beginning of the dark period or from a point near the middle of the dark period;
• a full dark and light period, sometimes called a nychthemeron in English, from the Greek for night-day;
• the time period from 6:00 AM to 6:00 PM or 9:00 PM or some other fixed clock period overlapping or set off from other time periods such as "morning", "evening", or "night".

Civil day[link]

For civil purposes a common clock time has been defined for an entire region based on the mean local solar time at some central meridian. Such time zones began to be adopted about the middle of the 19th century when railroads with regular schedules came into use, with most major countries having adopted them by 1929. For the whole world, 40 such time zones are now in use. The main one is "world time" or Coordinated Universal Time (UTC).

The present common convention has the civil day starting at midnight, which is near the time of the lower culmination of the mean Sun on the central meridian of the time zone. A day is commonly divided into 24 hours of 60 minutes of 60 seconds each.

Leap seconds[link]

To keep the civil day aligned with the apparent movement of the Sun, positive or negative leap seconds may be inserted.

A civil clock day is typically 86,400 SI seconds long, but will be 86,401 s or 86,399 s long in the event of a leap second.

Leap seconds are announced in advance by the International Earth Rotation and Reference Systems Service which measures the Earth's rotation and determines whether a leap second is necessary. Leap seconds occur only at the end of a UTC month, and have only ever been inserted at the end of June 30 or December 31.

Boundaries of the day[link]

Sun and Moon, Hartmann Schedel's Nuremberg Chronicle, 1493

For most diurnal animals, the day naturally begins at dawn and ends at sunset. Humans, with our cultural norms and scientific knowledge, have supplanted Nature with several different conceptions of the day's boundaries. The Jewish day begins at either sunset or at nightfall (when three second-magnitude stars appear). Medieval Europe followed this tradition, known as Florentine reckoning: in this system, a reference like "two hours into the day" meant two hours after sunset and thus times during the evening need to be shifted back one calendar day in modern reckoning. Days such as Christmas Eve, Halloween, and the Eve of Saint Agnes are the remnants of the older pattern when holidays began the evening before. Present common convention is for the civil day to begin at midnight, that is 00:00 (inclusive), and last a full 24 hours until 24:00 (exclusive).

In ancient Egypt, the day was reckoned from sunrise to sunrise. Muslims fast from daybreak to sunset each day of the month of Ramadan. The "Damascus Document", copies of which were also found among the Dead Sea scrolls, states regarding Sabbath observance that "No one is to do any work on Friday from the moment that the sun's disk stands distant from the horizon by the length of its own diameter," presumably indicating that the monastic community responsible for producing this work counted the day as ending shortly before the sun had begun to set.

In the United States, nights are named after the previous day, e.g. "Friday night" usually means the entire night between Friday and Saturday. This is the opposite of the Jewish pattern. This difference from the civil day often leads to confusion. Events starting at midnight are often announced as occurring the day before. TV-guides tend to list nightly programs at the previous day, although programming a VCR requires the strict logic of starting the new day at 00:00 (to further confuse the issue, VCRs set to the 12-hour clock notation will label this "12:00 AM"). Expressions like "today", "yesterday" and "tomorrow" become ambiguous during the night.

Validity of tickets, passes, etc., for a day or a number of days may end at midnight, or closing time, when that is earlier. However, if a service (e.g. public transport) operates from for example, 6:00 to 1:00 the next day (which may be noted as 25:00), the last hour may well count as being part of the previous day (also for the arrangement of the timetable). For services depending on the day ("closed on Sundays", "does not run on Fridays", and so on) there is a risk of ambiguity. As an example, for the Nederlandse Spoorwegen (Dutch Railways), a day ticket is valid 28 hours, from 0:00 to 28:00 (that is, 4:00 the next day). To give another example, the validity of a pass on London Regional Transport services is until the end of the "transport day" -- that is to say, until 4:30 am on the day after the "expiry" date stamped on the pass.

24 hours vs daytime[link]

To distinguish between a full day and daytime, the word nychthemeron (from Greek for a night and a day) may be used in English for the former, or more colloquially the term 24 hours. In other languages, the latter is also often used. Other languages also have a separate word for a full day, such as vuorokausi in Finnish, ööpäev in Estonian, dygn in Swedish, døgn in Danish, døgn in Norwegian, sólarhringur in Icelandic, etmaal in Dutch, doba in Polish, сутки (sutki) in Russian, суткі (sutki) in Belarusian, доба́ (doba) in Ukrainian, денонощие in Bulgarian and יממה in Hebrew. In Italian, giorno is used to indicate a full day, while dì means daytime. In Spanish, singladura is used, but only as a marine unit of length, being the distance covered in 24 hours.^{[7][not relevant]}

See also[link]

• 10⁴ s, times from 10 kiloseconds to 100 kiloseconds
• Calculating the day of the week
• Daylight
• Daylight saving time
• Meteorological day
• Season, for a discussion of daylight and darkness at various latitudes
• Synodic day

Notes and references[link]

External links[link]

Wikiquote has a collection of quotations related to: Day

Look up day in Wiktionary, the free dictionary.

• Definitions of day, night, twilight (USA navy site)
• Formulas to calculate the length of day and night
• Sunrise and sunset, all year long, anywhere
• Show where it is daytime at the moment

v t e Time Major concepts Time Eternity Arguments for eternity Immortality History Past Present Future Futures studies Deep time Time Portal Measurement and standards Chronometry UTC UT TAI Second Minute Hour Sidereal time Solar time Time zone Metric time Decimal time Hexadecimal time Clock Astrarium History of timekeeping devices Horology Marine chronometer Sundial Water clock Calendar Day Week Month Year Tropical year Gregorian Islamic Julian Intercalation Leap second Leap year Chronology Astronomical chronology Calendar era Chronicle Dating methodologies Geochronology Geologic Time Geological history Periodization Regnal year Timeline Religion and mythology Dreamtime Kāla Kalachakra Prophecy Time and fate deities Wheel of time Philosophy A-series and B-series B-Theory of time Causality Endurantism Eternal return Eternalism Event Perdurantism Presentism Temporal finitism Temporal parts The Unreality of Time Physical sciences Time in physics Absolute time and space Arrow of time Chronon Coordinate time Planck epoch Planck time Proper time Spacetime Theory of relativity Time dilation Gravitational time dilation Time domain T-symmetry Biology Chronobiology Circadian rhythms Psychology Mental chronometry Sense of time Specious present Sociology and anthropology Long Now Foundation Time discipline Time use research Economics Time value of money Time-based currency Time Banking Related topics Carpe diem Duration Space System time Tempus fugit Time capsule Time signature Time travel

v t e Parts of a day Dawn · Twilight–Sunrise · Morning · Daylight · Evening · Sunset–Twilight–Dusk · Night Related articles: Blue hour · Golden hour · Terminator · Forenoon · Noon · Afternoon · Midnight · Daytime · Midnight sun

v t e SI units Base units Ampere · Candela · Kelvin · Kilogram · Metre · Mole · Second Derived units Becquerel · Coulomb · Degree Celsius · Farad · Gray · Henry · Hertz · Joule · Katal · Lumen · Lux · Newton · Ohm · Pascal · Radian · Siemens · Sievert · Steradian · Tesla · Volt · Watt · Weber Accepted for use with SI Dalton (Atomic mass unit) · Astronomical unit · Day · Decibel · Degree Celsius · Degree of arc · Electronvolt · Hectare · Hour · Litre · Minute · Minute of arc · Neper · Second of arc · Tonne Atomic units · Natural units See also SI prefixes · Systems of measurement · Conversion of units · New SI definitions · History of the metric system Book:International System of Units  · Category:SI base units

Shane L. Koyczan (born 22 May 1976) is a Canadian poet and writer. Born in Yellowknife, Northwest Territories, Koyczan grew up in Penticton, British Columbia. In 2000, he became the first Canadian to win the Individual Championship title at the US National Poetry Slam.^[1] Together with Mighty Mike McGee and C. R. Avery, he is the co-founder of spoken word, "talk rock" trio, Tons of Fun University (T.O.F.U.). In August 2007 Shane Koyczan and his work were the subject of an episode of the television documentary series Heart of a Poet, produced by Canadian filmmaker Maureen Judge for broadcaster Bravo!.^[2]

Koyczan has published two books, poetry collection Visiting Hours, and Stickboy, a novel in verse. Visiting Hours was selected by both the Guardian and Globe and Mail for their 2005 Best Books of the Year lists.

Koyczan’s "We Are More" and Ivan Bielinski’s "La première fois", commissioned by the Canadian Tourism Commission, were unveiled at Canada Day festivities on Parliament Hill in Ottawa on 1 July 2007.^[3] Koyczan performed a variation on his piece at the Opening Ceremony of the 2010 Winter Olympics in Vancouver.^[4]

Koyczan also collaborated on Vancouver-based musician Dan Mangan's Roboteering EP on the track Tragic Turn of Events - Move Pen Move.

Bibliography[link]

• I'm Calling you friend
• Help Wanted
• I Drew That For You
• Visiting Hours (2005, House of Parlance Media; ISBN 978-0-9738131-0-4)
• Stickboy ( 2008, House of Parlance Media ISBN 978-0-9738131-6-6)^[5]

Discography[link]

• Perfect
• 2nd Time Around
• Visiting Hours
• American Pie Chart
• Shut Up And Say Something

With Tons of Fun University (ToFU):

• The Them They're Talking About (2005)
• Hard to Tell (2009)

As Shane Koyczan and The Short Story Long:

• A Pretty Decent Cape in My Closet (2007)
  • includes "The Crickets Have Arthritis"

As Shane Koyczan and The Short Story Long:

• "Remembrance Year" (2012)

Filmography[link]

• The 2000 National Poetry Slam Finals (2000, The Wordsmith Press)

Notes[link]

External links[link]

• Shane Koyczan and the Short Story Long at MySpace
• Text of "We Are More", as recited at the 2010 Olympics opening

Asaf Avidan
Asaf Avidan
Background information
Born	(1980-03-23) March 23, 1980 (age 32) Jerusalem
Genres	Folk, Folk rock, Rock, Blues
Instruments	Vocals, Guitar, Harmonica, Piano
Years active	2000s–present
Labels	Telmavar Records, Sony-Columbia
Associated acts	Asaf Avidan & The Mojos
Website	www.asafavidanmusic.com

Asaf Avidan (Hebrew: אסף אבידן‎) (born March 23, 1980) is an Israeli singer-songwriter and musician, best known for his voice, often compared to Janis Joplin and Robert Plant. He is also the creative force and front-man of folk/rock band Asaf Avidan & the Mojos.

Biography & Early Career[link]

Avidan was born in Jerusalem in 1980. His parents were diplomats for the Israeli Foreign Office, and he spent four years of his childhood in Jamaica. After the mandatory army service in Israel, Avidan studied animation at Jerusalem’s Bezalel Academy of Arts & Design. His final project short film, “Find Love Now”, won its category at the Haifa Film Festival that year. After his studies, Avidan moved to Tel Aviv and worked as an animator, until a breakup with his long-time girlfriend shook his world and made him move back to Jerusalem, quit his job and turn full time to his up-till-then hobby – music. Six songs about that breakup and subsequent heartache would constitute his debut EP, “Now That You’re Leaving”, which was released independently in 2006 to critical acclaim.

Asaf Avidan & the Mojos[link]

The Reckoning (2008)[link]

In late 2006, while playing solo shows across Israel, Avidan put together a support cast of musicians who would become The Mojos (Ran Nir – Bass, Yoni Sheleg – Drums, Roi Peled – Guitar, Hadas Kleinman – cello). The group played extensively in Israel, and also played a few New York shows, including MEANY Fest, where they advanced to the finals. In 2007 the band went into the recording studio together for the first time, and recorded “The Reckoning”. The album’s 15 tracks blended rock, folk and blues with Avidan’s lyrics about relationships and betrayal. By now the band had accumulated a huge live following in Israel and most record labels expressed interest. But Avidan decided to continue on the independent path, and founded (with his brother and manager, Roie Avidan) Telmavar Records, on which “The Reckoning” was released in March 2008. It reached Gold status in a year, platinum later, and would become the biggest selling independent record of all time in Israel. It was chosen as Album of the Year (2008) by various media, including TimeOut Tel Aviv. “Weak”, the second single of the album, became a huge radio hit and its video was Video of the Year on Israel’s music channel. “Weak” would also be the title song of the film "L'Arbre" by Julie Bertuccelli, which starred Charlotte Gainsbourg and was the closing film at Cannes Film Festival 2010.

While several European labels put offers on the table, the band opted to embark on a self-funded summer tour in 2009, playing dozens of festivals and venues across Europe. By the end of that summer, Telmavar Records signed a licensing deal with Sony-Columbia in Europe, for "The Reckoning" and for the band's future second LP.

The Reckoning was released in parts of Europe in 2009, to generally good reviews. In France iTunes chart it would peak at #8.

PoorBoy/Lucky Man (2009)[link]

"Poor Boy/Lucky Man", the band's second album, was released in Israel on 9/9/09. The album's title song and main theme would revolve around a boy born with a hole instead of a heart. The album was originally released in two different names and covers, leaving it up to the audience to decide whether this figure was poor or lucky. It would reach Gold status in Israel in 5 months, and garner ecstatic reviews. It was released in parts of Europe in April 2011. Among others, it was album of the month on France's national FIP radio, in the newspaper Liberacion, and in Germany's Eclipsed magazine.

The band continued to tour non-stop from 2009 all through 2011 (mostly in Israel and Europe but also in the US, Canada, China and India), building up a devoted following and a reputation for a legendary live show. Amongst the hundreds of shows, they played at Brandenburg Bridge at The World Championship of Athletics in Berlin; at the closing event at Cannes Film Festival 2010; at China’s biggest May 1 festivals; and at a tribute concert for The Who in Carnegie Hall, New York. They would play dozens of festivals across Europe (including Solidays France, Latitude UK, Paleo Switzerland, Frequency Austria, and Haldern Pop Germany) as well as countless radio and TV shows (including Taratata and One Shot Not in France, and two Rockpalast performances in Germany).

Through the Gale (2010)[link]

On November 30, 2010 the band released their 3rd album in Israel, "Through the Gale", a concept album telling the tale of the voyage of a blind and stubborn captain and his loyal crew in search of immortality, to the realms of the gods themselves, only to understand at the end that a voyage with no home, that a life without death, is meaningless.

Solo career[link]

In July 2011, following another summer tour that saw them sharing the stage with Robert Plant, Ben Harper and Lou Reed among others, Asaf Avidan & the Mojos announced that they are taking an indefinite creative break.

Avidan had continuously played solo and duo acoustic shows throughout the band's career, including "regular" venue shows as well as a TED Global Conference performance, supporting Bob Dylan, playing a tribute concert for The Who at Carnegie Hall and many radio and TV performances.

Avidan is set to continue touring and plans to go into the recording studio in the winter with a yet-unknown support cast of musicians.

Discography[link]

• 2006 – Now That You're Leaving (Asaf Avidan, Telmavar Records)
• 2008 – The Reckoning (Asaf Avidan & the Mojos, Telmavar/Columbia)
• 2009 – Poor Boy / Lucky Man (Asaf Avidan & the Mojos, Telmavar/Columbia)
• 2010 – Through the Gale (Asaf Avidan & the Mojos, Telmavar Records)

External links[link]

• Official Website
• Official Myspace profile
• Official Facebook fan page
• Official Vimeo page
• Official Youtube channel
• "Taratata" French TV performance
• TEDxTLV performance
• "Ce Sor Ou Jamais" TV performance
• Israel "Haproyect" video blog
• NYC show review
• The Reckoning album review, UK

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (October 2009)

Ice cubes in a glass of iced tea

Ice cubes are small, roughly cube-shaped pieces of ice, conventionally used to cool beverages. Ice cubes are sometimes preferred over crushed ice because they melt more slowly; they are standard in mixed drinks that call for ice, in which case the drink is said to be "on the rocks."

Ice cubes that are crushed or sheared into irregularly-shaped flakes may add an interesting aesthetic effect to some cocktails. Crushed ice is also used when faster cooling is desired, since the rate of cooling is governed by the number and average radius of the ice particles.^[1]

Melting ice cubes sometimes precipitate white flakes, commonly known as "floaties". This is calcium carbonate which is present in many water supplies and is completely harmless.^{[citation needed]}

Origin[link]

Gorrie's ice machine.

American physician and humanitarian John Gorrie built a refrigerator in 1844 with the purpose of cooling air. His refrigerator produced ice which he hung from the ceiling in a basin. Gorrie can be considered the creator of ice cubes, but his aim was not to cool drinks: he used the ice to lower the ambient room temperature. During his time, a dominant idea was that bad air quality caused disease. Therefore, in order to help treat sickness, he pushed for the draining of swamps and the cooling of sickrooms.

Methods of production[link]

Ice cubes are produced domestically by filling an ice cube tray with water and placing it in a freezer. Many freezers also come equipped with an icemaker, which produces ice cubes automatically and stores them in a bin from which they can be dispensed directly into a glass.

Ice cube tray[link]

Ice cubes in a tray

Ice cube trays are designed to be filled with water, then placed in a freezer until the water freezes to ice, producing ice cubes. Trays are often flexible, so the frozen cubes can be easily removed by flexing the tray. Twist ice trays have a simple spring loaded mechanism with a lever that is used to turn the tray upside down and flex at the same time such that the cubes drop are collected in a removable tray below and return the ice cube tray to its upright position without removing it from the freezer which can save time and reduces accidents and mess, though the tray has to be removed to be collected and the ice cube tray still has to be removed to be refilled. An alternative system is an aluminum tray with a lever that raises the ice cubes, freeing them from the tray. A motorized version of this is found in most automatic ice-making freezers.

While the usual shape of the ice 'cube' is roughly cubical, there are trays that dispense hemispherical or cylindrical blocks. These are commonly referred to as ice tubes. Some novelty trays produce blocks of ice in seasonal, festive or other shapes.

The first rubber ice cube tray was invented by Lloyd Groff Copeman. One day in 1928, while walking through some woods collecting sap for maple syrup, Copeman noticed that slush and ice flaked off his rubber boots rather than adhering to them. Having recalled this incident over lunch with his patent attorney, he conducted experiments using rubber cups. Later, he set about designing and then patenting different types of tray: a metal tray with rubber separators, a metal tray with individual rubber cups, and a tray made completely of rubber.^[2]

The first flexible stainless steel, all-metal ice cube tray was created by Guy L. Tinkham in 1933. The tray bent sideways to remove the ice cubes.

Several companies now offer pre-filled disposable ice trays for home freezing, which they claim provide better taste and reduced risk of contamination.^[3]

Large-scale ice cube production[link]

Dedicated ice-maker machines can be used to produce ice cubes for laboratories and academic use. Ice cubes are also produced commercially and sold in bulk; these ice cubes, despite their name, are often cylindrical, and may have holes through the center.

An interesting characteristic of commercially made ice cubes is that they are completely clear, lacking the clouding found in the center of domestically made ice cubes. Cloudy ice cubes result when water is frozen quickly, or when the water is high in dissolved solids. When water is cooled to its freezing point, and ice starts to form, dissolved gases can no longer stay in solution and come out as microscopic bubbles. However, as ice floats in water, once there is enough ice to form a layer on the surface, the ice layer traps all bubbles within the ice cube. Commercial ice-makers use a flowing source of purified water to make ice with cooling elements at the bottom, allowing the bubbles to be washed away from the top as the cube grows.^{[citation needed]}

See also[link]

Listen to this article (info/dl)

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More spoken articles

Wikimedia Commons has media related to: Ice cubes

• Ice pack
• Pagophagia
• Refrigeration
• Ice

References[link]

1. ^ Rauch, Jeffrey (1975). "The mathematical theory of crushed ice". Partial differential equations and related topics (Program, Tulane Univ., New Orleans, La., 1974). Berlin, New York (the state): Springer-Verlag. pp. 370–379. MR0427863. 
2. ^ "www.lloydcopeman.com: Biography". http://www.lloydcopeman.com/biography/CopemanStory.pdf. 
3. ^ "After Bottled Water? Purified Ice Cubes". http://www.aquaice.com/PressRelease_WSJ_2006.htm. Retrieved 2008-06-03. 

External links[link]

Look up ice cube in Wiktionary, the free dictionary.

• Hot water can freeze faster than cold water (Subscription required)

Adam Savage
Savage in July 2011
Born	Adam Whitney Savage[1] (1967-07-15) July 15, 1967 (age 44) New York City, U.S.
Nationality	American
Education	Tisch School of the Arts
Occupation	MythBusters co-host, designer/fabricator, actor, educator
Height	6'0"
Religion	None (Atheist)
Spouse	Julia Savage (2002-present)
Children	Two
Website
adamsavage.com

Adam Whitney Savage (born July 15, 1967)^[2] is an American industrial design and special effects designer/fabricator, actor, educator, and co-host of the Discovery Channel television series MythBusters.^[1] His model work has appeared in major films, including Star Wars: Episode II - Attack of the Clones and The Matrix Reloaded. He is a prominent member of the skeptic community. He lives in San Francisco with his twin sons and wife, Julia.

Early life and education[link]

Born in New York City, Savage was raised in Sleepy Hollow in Westchester County New York.^[3] He graduated from Sleepy Hollow High School in 1985.^[4] His father, Whitney Lee Savage (1928-1998), was a painter, filmmaker and animator known for his work on Sesame Street, and has a permanent exhibit in the Avampato Discovery Museum.^[5] His mother is a psychotherapist. His sister Kate Savage is also an artist. As a teenager in Sleepy Hollow, he routinely visited the local bike shop to have flat tires fixed. The shop showed him how to do the repairs himself. From this experience, Savage said, "I realized you could take a bike apart and put it back together and it wasn't that hard...I've been building and putting bicycles together since then."^[4]

Adam Savage began acting as a child, and has had five years of acting school.^[1] His early credits include voicing animated characters that his father produced for Sesame Street, Mr. Whipple's stock boy "Jimmy" in a Charmin commercial, a helper in the special effects of Star Wars, and a drowning young man saved by a lifeguard in the 1985 Billy Joel music video "You're Only Human (Second Wind)."^[6] He attended New York University's Tisch School of the Arts for acting for six months before dropping out.^[7]

Describing the early abandonment of his acting career, Savage said "...by the time I was, I guess probably nineteen, I had passed on that in favor of doing stuff with my hands – graphic design, assistant animation in New York, and then eventually working in theater in San Francisco, and film special effects. Then MythBusters came along and it was the perfect marriage of two things, performance and special effects."^[8] On November 25, 2011, Savage received an honorary doctorate from the University of Twente (Enschede, Netherlands) for his role in the popularization of science and technology.^[9][10]

Career[link]

Savage in July 2008

Savage has worked as an animator, graphic designer, carpenter, projectionist, film developer, television presenter, set designer, toy designer, and gallery owner. He worked as a model maker on the films Galaxy Quest, Bicentennial Man, Star Wars: Episode II - Attack of the Clones, The Matrix Reloaded, and Space Cowboys, among others.

Savage played the role of a helpful engineer in the 2001 film Ever Since the World Ended^[11] and the role of an army surplus store owner who sells a man a rocket engine for his pickup truck in 2006 in The Darwin Awards, which also featured MythBusters co-star Jamie Hyneman.^[12] He made a cameo appearance along with Jamie Hyneman on CSI: Crime Scene Investigation on the May 1, 2008, episode "The Theory of Everything." In the "making of" material for The Matrix Revolutions, he appears in his role as a special effects artist and discusses some of the miniature effects used and the difficulties involved.

He previously taught advanced model making in the department of Industrial Design at the Academy of Art University in San Francisco.^[1]

Savage has become a regular presenter at magician James Randi's annual skeptics' conference, The Amaz!ng Meeting, since first appearing in January 2006.^[13] He also appeared in the UK, giving a talk at the first Amazing Meeting London from October 3–4, 2009, hosted at the Mermaid Conference Centre, Blackfriars.^[14]

Savage was a featured performer at the three w00tstock v1.x shows in 2009, and appeared in four w00tstock v2.x shows in 2010. He also appeared as a guest on Diggnation's 220th show.^[15]

Savage has also been a regular guest speaker at the annual Maker Faire since 2008, speaking on different topics such as his obsession with the dodo bird and problem solving, and also taking questions from the audience members about the Mythbusters and other things.

Savage hosted an episode of the Discovery Channel series Curiosity, in which he speculated as to whether or not it is possible for humans to live forever. During the program various topics such as limb regeneration, organ printers, and even age reversal are discussed.

Savage and Hyneman are judges on the game show Unchained Reaction which premiered in March 2012.^[16]

[edit] MythBusters

Savage has been involved in MythBusters since its creation. His role in the show (that he shares with all the other talent) is to either disprove ("bust") myths or confirm them through testing and experiments done at different scales. If the myth is about a one-time occurrence and not about whether or not something can happen at all, it is often deemed "plausible" instead.

Savage's demeanour on MythBusters is animated and energetic, providing a foil to Jamie Hyneman's more reserved straight man persona.^[17]

Savage and Hyneman were the only hosts of the show for the first season of MythBusters, but starting with the second season, members of Hyneman's staff were introduced and began to appear regularly in episodes; Kari Byron, Tory Belleci and welder Scottie Chapman appeared in the second season. In the third season, Chapman was replaced by Grant Imahara, a robot builder and model maker. In an interview Savage gave during The Amaz!ng Meeting 5, he expressed an interest in proving natural selection over creationism on MythBusters.

Savage also stated that such an episode is unlikely because MythBusters has a policy against trying to disprove supernatural phenomena.^[19]

Personal life[link]

At Reason Rally Washington D.C. March 23, 2012

Savage and his wife Julia were married in 2002. He has twin sons from a previous relationship.^[20] He wears a hearing aid on his left ear due to a congenital condition.^[21] He is a practiced juggler, as seen on Mythbusters. He is also an atheist.^[22] He has a lifelong interest in costume making. He said, "I remember my mom getting me a 'Jaws' costume when 'Jaws' came out...and wearing a Batman costume. Back then, everyone dressed up as hobos." He strives for authenticity with his costumes. While in high school, he and his father made a suit of armor out of aluminum roof flashing that had 700 rivets. He said, "I wore it to school and passed out from heat exhaustion in math class. I woke up in the nurse's office and the first thing I said was 'Where's my armor'?" In 2011, he built a costume based on the character No-Face from the film Spirited Away.^[4] In early 2012, it was announced that he would be the commencement speaker at Sarah Lawrence College.^[23]

References[link]

External links[link]

Wikimedia Commons has media related to: Adam Savage

• Adam Savage's personal website
• Adam Savage at the Internet Movie Database
• Adam Savage on Twitter
• Adam Savage's biography from the Discovery Channel
• Interview with The Sneeze
• Interview with Reddit.com
• Adam Savage interviewed on Penn Radio
• Discovery
• Savage Presentation at The Entertainment Gathering (December 2008)
• Adam Savage on Diggnation (September 2009)
• Adam Savage interviewed on Geek a Week