Exogenesis
Exogenesis ("outside origin") is a hypothesis that proposes life on Earth was transferred from elsewhere in the Universe. Panspermia is similar but hypothesises that seeds ("sperma") of life are general throughout the Universe.
This is a possible solution to the creationists' first cause: natural rather than god-given origin. However, it merely pushes the problem back one step, for now we must ask where the seeds came from.
Sir Fred Hoyle and Chandra Wickramasinghe[wp] were supporters of the hypothesis and further contended that lifeforms continue to enter the Earth's atmosphere, and may be responsible for epidemics, new diseases, and the triggers for evolutionary spurts.
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Imperial College, London scientists have confirmed for the first time that important components of early genetic material, including uracil and xanthine, found in meteorite fragments are extraterrestrial in origin.