Learn about two marsupial species discovered in New Guinea that were thought to have been extinct for 6,000 years.

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

Two marsupials thought extinct for over 7,000 years were rediscovered in New Guinea through fossils, photos and citizen science.

Researchers discovered that a 215-million-year-old reptile started life on four legs and switched to two as an adult.

In paleontology, lineages that drop out of the fossil record and then re-emerge after long periods are termed ‘Lazarus taxa.’ ...

The Spinosaurus is a sail-backed, crocodile-snouted dinosaur that Hollywood depicted as a giant terrestrial predator capable of taking down a T. rex in Jurassic Park 3. Then they changed their mind ...

After years of analysis, the animal turned out to be an entirely new species — one that lived millions of years longer than ...

Until now, scientists have only known about the animals from fossils. But they suspected the creatures might still be alive, ...

Indigenous people in Papua, Indonesia, have helped scientists track down two animals that were thought to have gone extinct thousands of years ago: a relative of Australia’s greater glider and a ...

Scientists discovered a bizarre 275-million-year-old aquatic animal with sideways teeth and a twisted jaw in Brazil, revealing a rare “living fossil” lineage from the Permian period.

With its uniquely twisted jaw and sideways-facing teeth, the new species was a relic of an earlier and more experimental time in the evolution of life on Earth. Fossils discovered in Brazil show that ...

The remains of a "weird" creature with a twisted jaw and sideways-facing teeth have been discovered in the Amazon jungle.