A new study theorizes that evolution ticks at different speeds, especially when a big group of organisms first appears.

About 445 million years ago, Earth nearly wiped out life in the oceans. Glaciers spread across the supercontinent Gondwana, ...

Charles Darwin worried that the fossil record looked strangely abrupt, with complex animals appearing in a geological instant ...

Sponges are among Earth's most ancient animals, but exactly when they evolved has long puzzled scientists. Genetic ...

Jawbones and other remains, similar to specimens found in Europe, were dated to 773,000 years and help close a gap in ...

The oldest fossilised remains of complex animals appear suddenly in the fossil record, and as if from nowhere, in rocks that ...

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

The Moroccan fossils now provide tangible evidence from this mysterious transitional period. What makes these fossils particularly significant is the precision with which they can be dated. The ...

Fossilized bones and teeth dating back 773,000 years, discovered in Morocco, provide insight into early human evolution.

Creepy collector she is not; Cooke's quest for canines, incisors, and molars is driven by a desire to better understand Earth's past. Give this intrepid paleontologist a fossilized tooth, and there's ...

The fossil record of baleen whales (Mysticeti) offers a window into one of the most dramatic evolutionary transitions among mammals. Early cetaceans evolved from terrestrial artiodactyl ancestors into ...