How did life start on Earth?

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Evolved from micro organisms

Seeded by comets or meteors

Seeded by Aliens

Other

What do you think is most likely?

Did life evolve from micro organisms that emerged from a primordial soup? Or did the building blocks of life arrive here from a comet or meteor? Or could an alien civilisation have 'seeded' life on this planet? Or something else?

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I wanted to vote on both microörganisms and comets/meteors. My guess is there is around three or four origins of life on earth that are independent of each of others.

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