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A genetic analysis of a 45,000-year-old thigh bone narrows down the time when modern humans and Neanderthals first interbred.A 45,000-year-old leg bone is raising questions about just how close modern-day humans are to our thick-browed Stone Age ancestors. DNA from the femur of a Siberian man is helping to pinpoint when modern humans and Neanderthals first interbred, researchers say. But what does this mean for the human connection to a species that disappeared nearly 30,000 years ago? The thigh bone, spotted six years ago on the banks of the Irtysh River in Siberia by a Russian artist who carves jewelry...

Stone tools uncovered in Mongolia by an international team of archaeologists indicate that modern humans traveled across the Eurasian steppe about 45,000 years ago, according to a new University of California, Davis, study. The date is about 10,000 years earlier than archaeologists previously believed.