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.
Dọc thêm tại NPR
Opinion
August 1, 2017 at 07:10PM
Thứ Ba, 1 tháng 8, 2017
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