Add Yahoo as a preferred source to see more of our stories on Google. Genetic tweaks changed how the hip bones of early humans developed, which allowed them to start walking upright on two legs, ...

The discovery of ancient human cousins has long stirred wonder and debate. Early Neanderthal remains offered a glimpse into our distant past, prompting questions about how they lived and whether they ...

Our prehistoric human ancestors relied on deliberately modified and sharpened stone tools as early as 3.3 million years ago. The selection of rock type depended on how easily the material could be ...

It's easy to take for granted that with the flick of a lighter or the turn of a furnace knob, modern humans can conjure flames — cooking food, lighting candles or warming homes. For much of our ...