During these waves of mass extinction, most vertebrate survivors were confined to refugia, or isolated biodiversity hotspots ...

Some 445 million years ago, life on Earth was forever changed. During the geological blink of an eye, glaciers formed over ...

The way Sahaleanthropus tchadensis moved has long been debated. The discovery of a small bump on the front of the thigh bone ...

By cutting into a tiny throat bone, Princeton's Chris Griffin showed that it belonged to an adult of a smaller tyrannosauroid ...