Did ancient supernovae prompt human ancestors to walk upright?
Tuesday, May 28, 2019 - 22:24
in Astronomy & Space
Supernovae bombarded Earth with cosmic energy starting as many as 8 million years ago, with a peak some 2.6 million years ago, initiating an avalanche of electrons in the lower atmosphere and setting off a chain of events that feasibly ended with bipedal hominins.