The theory that humankind originated in Europe is an old one. It was abandoned in 1924 when the first Australopithecus was discovered in South Africa.
Evidence of Homo naledi's age suggests we need to rethink our understanding of human history and evolution.
Cancer is a deadly disease and would have been particularly lethal before the recent development of effective treatments. So why didn’t it – or our susceptibility to it – die out long ago?
Beyond the cool factor of figuring out hominin hearing capacities two million years ago, these findings could help answer the tantalizing question of when did human vocalized language first emerge.