Are We All Asians? Renegade anthropologists rethink where humans came from. By Susan Kruglinski DISCOVER Vol. 27 No. 05 | May 2006 Courtesy of G. Tsibahashivili (National Museum of Georgia) One of the best-known theories about human evolution—that the ancestors of Homo sapiens originated in Africa before populating the rest of the world 2 million years ago—is coming under fire. In a challenge to conventional wisdom, Robin Dennell of the University of Sheffield in England and Wil Roebroeks of Leiden University in the Netherlands argue that the "out of Africa" interpretation is built on shaky evidence. Maybe, they say, it...