Scientists discover world’s oldest stone tools date to 3.3 million years ago

Scientists working in the desert badlands of northwestern Kenya have found stone tools dating back 3.3 million years, long before the advent of modern humans, and by far the oldest such artifacts yet discovered. More...

Why we have chins

Look at a primate or a Neanderthal skull and compare it with a modern human’s. Notice anything missing? We have one feature that primates, Neanderthals, archaic humans–any species, for that More...