This drawing represents a comet bringing atmospheric molecules and possibly the building blocks of life to the Earth's surface.
Click on image for full size
JPL/NASA
Did Comets bring Life to Earth?
Believe it or not, a few scientists believe it is possible that life may have begun on comets. Out in their distant home, the
Oort Cloud, comets are exposed to the kind of energy needed to form the beginnings of life..
Comets might have brought some of the building blocks of life with them and left them on planets like Earth where they could live better. Comets have even hit a planet's surface, such as the case when comet Shoemaker-Levy 9 hit the planet Jupiter in 1995.
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