Panspermia is the hypothesis that life did not originate on Earth, but instead evolved somewhere else in the universe and was seeded somewhere else by cosmic dust, asteroids, meteors, extraterrestrial spacecraft, or some other mechanism.

Panspermia is the hypothesis that life did not originate on Earth, but instead evolved somewhere else in the universe and was seeded somewhere else by cosmic dust, asteroids, meteors, extraterrestrial spacecraft, or some other mechanism.