Question

when did life begin ?
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Answer 1

Required Answer :

☑We know that life began at least 3.5 billion years ago, because that is the age of the oldest rocks with fossil evidence of life on earth.

Answer 2

4.5 billion years ago

4.5 billion years agoThe Earth itself is not much older, having formed 4.5 billion years ago. If we assume that life formed on Earth – which seems reasonable, given that we have not yet found it anywhere else – then it must have done so in the billion years between Earth coming into being and the preservation of the oldest known fossils.