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1. www.britannica.com › science › extraterrestrial-lifeExtraterrestrial life | Definition, SETI, & Facts | Britannica

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   Sep 5, 2024 · Extraterrestrial life refers to life that may exist or may have existed in the universe outside of Earth. The search for extraterrestrial life encompasses many fundamental scientific questions, including ‘What are the basic requirements for life?’ and ‘Are there other planets like Earth?’

2. www.scientificamerican.com › article › the-searchThe Search for Extraterrestrial Life as We Don’t Know It

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   Feb 1, 2023 · Scientists are abandoning conventional thinking to search for extraterrestrial creatures that bear little resemblance to Earthlings

3. www.britannica.com › science › extraterrestrial-lifeExtraterrestrial life - Exoplanets, Habitability, Astrobiology

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   Sep 5, 2024 · Extraterrestrial life - Exoplanets, Habitability, Astrobiology: For thousands of years humans have wondered whether they were alone in the universe or whether other worlds populated by more or less humanlike creatures might exist.

4. astrobiology.nasa.gov › aboutAbout Astrobiology | Astrobiology

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   Oct 12, 2022 · A sampling of examples: • What were the steps that led inanimate materials – rocks, sediments, organic compounds, water – to come together and build living organisms, with replicating genes, cell walls, and the ability to reproduce? • What led to the proliferation of new life forms on Earth?

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5. kids.britannica.com › extraterrestrial-life › 274243extraterrestrial life - Students | Britannica Kids | Homework ...

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   The branch of biology concerned with extraterrestrial life, from microscopic organisms to intelligent beings, is called exobiology or astrobiology. Scientists in this field consider the conditions necessary for life and how it evolves.

6. www.britannica.com › science › extraterrestrial-lifeThe search for extraterrestrial life - Encyclopedia Britannica

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   Sep 5, 2024 · The search for extraterrestrial life is most clearly grasped by imagining the reverse situation. For example, if humans were on Mars, examination of Earth for life with the full armory of contemporary scientific instrumentation and knowledge would be illuminating. Both remote and in situ testing might be attempted.

7. People also ask

   What is extraterrestrial life?

   • extraterrestrial life, life that may exist or may have existed in the universe outside of Earth. The search for extraterrestrial life encompasses many fundamental scientific questions. What are the basic requirements for life? Could life have arisen elsewhere in the solar system? Are there other planets like Earth?

   Extraterrestrial life | Definition, SETI, & Facts | Britannica

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   How do you know if extraterrestrial life exists?

   • No one knows if extraterrestrial life, or life that originated beyond Earth, exists or ever existed. The branch of biology concerned with extraterrestrial life, from microscopic organisms to intelligent beings, is called exobiology or astrobiology. Scientists in this field consider the conditions necessary for life and how it evolves.

   extraterrestrial life - Students | Britannica Kids | Homework Help

   kids.britannica.com/students/article/extraterrestrial-life/274243

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   Does extraterrestrial life have a different biochemistry than Earth life?

   • Even if extraterrestrial life is based on carbon and uses water as a solvent, like Earth life, it may still have a radically different biochemistry. Life is generally considered to be a product of natural selection.

   Extraterrestrial life - Wikipedia

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   Can extraterrestrial life be found elsewhere?

   • Although no extraterrestrial life has been found and life may still be just a rarity from Earth, there are scientific reasons to suspect that it can exist elsewhere, and technological advances that may detect it if it does. Many scientists are optimistic about the chances of finding alien life.

   Extraterrestrial life - Wikipedia

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8. en.wikipedia.org › wiki › Extraterrestrial_lifeExtraterrestrial life - Wikipedia

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   Extraterrestrial life, or alien life (colloquially, aliens), is life which does not originate from Earth. No extraterrestrial life has yet been conclusively detected. Such life might range from simple forms such as prokaryotes to intelligent beings, possibly bringing forth civilizations that might be far more advanced than humans.