A 3-rooted lower molar, a rare trait primarily found in modern Asian lineages, was previously thought to have evolved after Homo sapiens dispersed from Africa. A new analysis of the so-called Xiahe mandible, a 160,000-year-old fossilized Denisovan jawbone from Baishiya Karst Cave, the Tibetan Plateau, China, points to a different evolutionary path. Denisovans were probably dark-skinned, unlike the pale Neanderthals. The picture shows a Neanderthal...
