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Huge tunnels under southern Brazil and northern Argentina were potentially made by giant, Ice Age sloths for refuge and rest ...

Ancient inhabitants of the Arabian desert created monumental works of rock art on cliff faces, including life-sized images of camels, perhaps as a way to mark sources of water. Michael Petraglia, at ...

Scientists have uncovered how ancient Easter Islanders moved massive moai statues. Instead of dragging them flat, the statues were rocked upright. T ...

Lead exposure has been thought to be a uniquely modern phenomenon. Exposure to lead by ancient humans could have given modern humans a survival advantage over other species – more specifically, their ...