A 300,000-year-old skull found in China may belong to a completely unknown human species—rewriting everything we thought we ...

The more species of Homo there were, the higher the rate of speciation. So when those niches got filled, something drove even more species to emerge. This is almost unparalleled in evolutionary ...

Both ancient human species showed signs of simultaneously using their hands to move around – such as by climbing trees – as well ... show there wasn't a simple "evolution in hand function ...

Both ancient human ... on trees or cliffs, said study co-author and paleoanthropologist Samar Syeda of the American Museum of Natural History. The research was published Wednesday in Science Advances.