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Most scientists agree that life on Earth appeared 3.6 billion years ago. The first life forms on the planet were prokaryotes.

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10y ago

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How long have germs existed?

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If Earth's history was represented by one 24-hour day approximately how long has life proliferated on the planet?

Life has existed for most of the history of Earth. It is not known exactly for how long, but it seems to have existed for at least 3.7 billion years; you can compare this with the 4.568 billion years that the Solar System existed. It is possible that life existed longer, but left no traces (fossils).


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