A newly analyzed site in northern Kenya is reshaping the story of early human technology. An international team reports more than 1,200 stone tools from three stacked layers that span roughly 300,000 years – from 2.75 to 2.44 million years…

A newly analyzed site in northern Kenya is reshaping the story of early human technology. An international team reports more than 1,200 stone tools from three stacked layers that span roughly 300,000 years – from 2.75 to 2.44 million years…