New fossil provides clues to human family tree

Scientists have uncovered the remains of an early modern human in China. The 40,000-year-old skeleton is important, because there are very few human fossils of that age in this part of the world.

Most scientists believe that modern humans evolved in Africa and spread across the globe about 70,000 years ago. They replaced older forms of humans, such as Neanderthals.

Scientists disagree over whether modern humans interbred with the earlier populations. The new fossil, while clearly of a modern human, does contain some features of other types, thus lending weight to the theory that the various populations did mix.

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