For centuries, scientists have sought a biological method for tracing a person's geographic origin. Now, a group of researchers has developed a test.
DNA analysis and new archaeological finds are allowing scientists to more accurately recreate what our early ancestors looked like.
The DNA gleaned from two ancient Siberian skeletons is found to be related to that of modern-day Native Americans and western Eurasians.
It turns out Neanderthals may have had more brawn, but modern humans could run -- and run.