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Extraterrestrial life

Extraterrestrial life is life that may exist and originate outside the planet Earth, the only place in the universe currently known by humans to support life.

Its existence is currently purely hypothetical as there is yet no evidence of any planets that can support life, or actual extraterrestrial life that has been widely accepted by the scientific community.

Most scientists hold that if extraterrestrial life exists, its evolution would have occurred independently in different places in the universe.

An alternative hypothesis, held by a minority, is panspermia, which suggests that life in the universe could have stemmed from a smaller number of points of origin, and then spread across the universe, from habitable planet to habitable planet.

These two hypotheses are not mutually exclusive.

Note: This article excerpts material from the Wikipedia article "Extraterrestrial life", which is released under the GNU Free Documentation License.

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last updated on 2014-11-25 at 11:48 pm EST

Life Discovered in Space

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Buzz60 (Aug. 22, 2014) Cosmonauts aboard the International Space Station discovered life in the vacuum of space when they took samples along the outside and tested them. A very shocking discovery that proves that yes, life really does find a way. Patrick Jones (@Patrick_E_Jones) explains. Video provided by Buzz60
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NASA: We'll Find Aliens Within 20 Years

NASA: We'll Find Aliens Within 20 Years

Buzz60 (July 17, 2014) A panel of NASA scientists discussed the next steps in the search for life outside of Earth and they seemed pretty confident. Even saying life could be discovered within the next 20 years with the use of the James Webb Space Telescope. Patrick Jones (@Patrick_E_Jones) explains. Video provided by Buzz60
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Chris Hadfield's Son Helps Create Viral Video About Life as an Astronaut

Chris Hadfield's Son Helps Create Viral Video About Life as an Astronaut

Buzz60 (Oct. 31, 2013) Retired Canadian Astronaut Chris Hadfield isn't the only person in his family able to create a viral video; his son, Evan, created an amusing video about the everyday life of an astronaut, and it is racking up thousands of YouTube views. Jen Markham explains why the video was made to promote Chris Hadfield's new book.
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Brilliant Minds: Astrophysicist Jingnan Guo

Brilliant Minds: Astrophysicist Jingnan Guo

Deutsche Welle (July 14, 2013) Even when she was a child, Jingnan Guo was fascinated by space. Today the 28-year-old astrophysicist from China heads a research team at the German University of Kiel. Her team developed an instrument for the US research robot CURIOSITY to measure radiation levels on the surface of Mars for the very first time. That information will help us understand whether conditions on the Red Planet could one day be conducive to life. The 'Brilliant Minds' series on TOMORROW TODAY introduces young researchers from all over the world who have chosen to live and work in Germany.
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