Who Were Your Millionth-Great-Grandparents?
Our pre-human ancestors are back there somewhere in the deep time that makes up Earth's braided history of life and change — and we are the tip of the spear moving that life forward, says Adam Frank.
Read more on NPR
Health & Science - August 1, 2017 at 07:10PM - Who Were Your Millionth-Great-Grandparents?
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