Ancient skull discovery offers researchers a view into past

Aired: 10/18/2013 | 0:06:46 | Clip
The discovery of a 1.8 million-year-old skull at Dmanisi in Georgia has revolutionized scientists' idea of human evolution. Paleoanthropologist Donald Johanson of the Institute of Human Origins at Arizona State University joins Jeffrey Brown to discuss what these ancient remains teach us about our ancestors and origins.

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