Exploratour - The Archean Age
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JPL/NASA
Scientists believe it is possible that life may have begun on these distant, solar system traveling objects. Out in their distant home, the Oort Cloud, comets are exposed to the kind of energy needed to form the long, complex molecules of which life is thought to begin with. Thus, the crash of a comet onto the surface may have also brought the elements of life to the Earth.
Read more about comets by reading our comet section. Read more about comet crashes by taking the Exporatour of Spectacular Crashes in the Solar System, at the bottom of this page.