If Homosapiens survived the last mass extinction how is there almost 8 billions Humans now? Are we all related? Is every human related in some way?
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Every human IS related to some extent. That extent tends to be very, very far back. Mitochondrial Eve (the most recent common female ancestor of all humans) is estimated to have lived 150k years ago, and Y-chromosome Adam (male version of the same thing) 200-300k years ago.
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