Researchers analyzed fossils and DNA to get a big-picture view of sloth evolution and determine what drove their immense size ...

Thousands of fossils from the La Brea tar pits in California show no signs of mammals and birds evolving in response to ...

Around 66 million years ago, a six-mile-wide asteroid hit Earth, triggering the extinction of three-quarters of all living ...

A prehistoric discovery near Hays is shedding some new light on a giant ground sloth species that lived more than 10,000 ...

When a student stumbles on a fossil that turns out to be over 30,000 years old, it changes the way science is seen – not as ...

Newly found fossils show that those rivers were home to fish, turtles, river sharks, and even hippos. On land, elephants, ...

The massive megalodon was not hunting only large marine mammals such as whales as researchers widely thought, a new study of ...

Scientists are probing woolly mammoth and Neanderthal genetic codes for new compounds as today’s drugs lose potency.

A rare fossil discovery in Antarctica has upended scientific understanding of ancient marine reptiles. Buried beneath 68 million years of sediment, a soft-shelled egg as big as a football has emerged ...