Watch Earth's History Play Out On A Football Field
If our planet's 4.5-billion-year existence were laid out on a 100-yard timeline, when and where would humans first show up? Good question. NPR's Skunk Bear hits the gridiron for a reality check.
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at November 23, 2016 at 02:56AM
Health & Science
Thứ Tư, 23 tháng 11, 2016
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