Walking upright all the time is one of the unique features that sets Homo sapiens apart from other primates still around today. But, before we stood up and started strolling, how did our ancestors ...

Add Yahoo as a preferred source to see more of our stories on Google. Human evolutionary science has long been caught up in a debate: Did our last common ancestor with apes walk on its knuckles, like ...

In this 4.4-million-year-old skeleton, scientists may have found the missing step between climbing and walking.

In 2001, researchers unearthed a scattering of fossils beneath the windswept dunes of the Djurab Desert of northern Chad. The remains were later identified as belonging to an extinct species, ...

Walking around upright on two feet is something no other primate does routinely. It seems to be one of the earliest major shifts in the evolutionary path that eventually led to us, modern humans. But ...