大象传媒

There are 180,000 years missing from our understanding of early human life. Professor Rick Potts from the Smithsonian Institution describes for Roland Pease how quickly and inexplicably the lives of humans changed during a particular period of rapid evolution.

PHOTO CREDIT - A photo of older, more archaic handaxes used by early humans in East Africa, before 320,000 years ago. [Credit: Human Origins Program, Smithsonian]