Fossils of tiny, jawless marine animals reveal tooth structures sharper than sharks or steel, forcing scientists to rethink ...

These "total monsters of fishes" are extinct today, though new clues about their lives come from CT scans and their closest ...

A pair of 'Sacabambaspis' fish, around 14 inches (35 centimeters) in length, which had distinct, forward-facing eyes and an ...

Koalas are endangered today. However, habitat loss is not the only factor causing population decline. Chlamydia has played a ...

A new analysis of enigmatic skulls from the Republic of Georgia suggest that Homo erectus wasn't the only human species to ...

The released birds are the closest living relatives of the extinct Arabian ostrich. The flightless animals' return is part of ...

While late M-stars are the easiest places to find Earth-sized planets, a new study suggests they are biological dead ends where animal life may never find enough fuel to evolve.

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

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

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