The first Homo sapiens appeared on the planet some 200,000 years ago. But even though they looked fully human, they didn't act fully human until they began creating symbolic art, some 100,000 years later. Paleoanthropologist Ian Tattersall discusses those human origins in his book Masters of the Planet.
How Homo Sapiens Became 'Masters Of The Planet'
By editor • Apr 6, 2012