,000,000-year-old Siberian skull of an early human form. Sorting these fossils chronologically, they recognized a key shift between a "chengjiang man," who was closely related to Neanderthals, and the ancestors of modern humans.

Their result was a striking conclusion: we now have a record of the first human in Eurasia, and it shows a distinct genetic make-up. This makes the hunt for additional fossils extremely valuable, which is why Chinese 50e0806aeb walijayn