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if we imagined earths total 4.5 billion year history to be over the span of one day, how long ago did humans begin to walk the earth?
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if we imagined earths total 4.5 billion year history to be over the span of one day, how long ago did humans begin to walk the earth?

User Saman Salehi
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1 Answer

2 votes
Not sure what your asking, but I would say 200,000 years ago
User Fabiim
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