LifeExtinct relative of koalas discovered in Western Australia Fossils reveal that there were at least two kinds of koala when humans first arrived in Australia, but one died out about 30,000 years ago when the west of the continent dried out News
HumansWas our earliest ancestor a knuckle-dragger, or did it walk upright? Did Sahelanthropus, which lived 7 million years ago, walk on two legs like a modern human? It's complicated News