Fossil Find Points To A Streamlined Human Lineage

Conventional wisdom about early human evolution is that several species arose in Africa. But a skull found in the former Soviet state of Georgia could upend this idea. The discovery suggests that there may have been more variety in a single species than previously suspected.

Source: http://www.npr.org/2013/10/17/236171952/fossil-find-points-to-a-streamlined-human-lineage?ft=1&f=1007

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