Archaeologists have discovered sophisticated stone tools in India dating back some 385,000 years. That's all sorts of incredible, because Homo sapiens such as you and me didn't leave Africa until about 175,000 years ago. The discovery is resetting what we know about so-called "archaic" humans and the dramatic extent to which they spread out from Africa so very long ago.
Humans have been eating other humans since the beginning of time, but the motivations behind this macabre practice are complex and often unclear. Some anthropologists say prehistoric cannibals were just trying to grab a nutritious snack, but new research shows that human flesh -- as tasty as it is -- doesn't pack the same caloric punch as wild animals. In other words, cannibalism wasn't worth the trouble given alternatives.
