Scientists have confirmed that two marsupial species, known only from ancient fossils for more than 7,000 years, are still ...

Three tiny Purgatorius teeth found in Colorado are helping scientists trace how early primates evolved and spread across North America.

A fossil skull barely 1 inch long has proved to be a newborn reptile from Brazil’s Late Triassic, a period more than 230 million years ago when early reptiles dominated land ecosystems. Its tiny jaw ...

Scientists long believed stem tetrapods largely disappeared after a major ecological event known as the Carboniferous Rainforest Collapse. That event caused widespread destruction of tropical forests ...

The death of this ancient species, discovered alongside more newly described mammals, had been greatly exaggerated.

The pygmy long-fingered possum and the ring-tailed glider, until now known only through fossils, have been rediscovered.

Mammals are not especially diverse. Roughly 6,800 mammal species are known to exist, compared with about 8,800 species of amphibian, 11,000 species of bird and 12,500 of reptile. Yet when most people ...

When the identification of a fossil animal is completely based on a single bone, the design of the bone is important. Another Permian animal with no complete body akin only to the low jaws has a ...

While there is a common belief that the evolution of humans can be traced back to fishlike vertebrate ancestors, pinpointing the origins of bony fish — a key group in this evolution — remains ...

A plantation worker photographed this new genus of mammal in New Guinea, thought to have been dead for 6,000 years.

Chinese paleontologists have discovered the world's oldest complete bony fish fossils, dating back 436 million years ...

new study reveals that large predators were already hunting big plant-eating animals more than 280 million years ago, ...