Scientists say this shark has hardly changed since it first appeared millions of years ago. That’s why they’re so fascinated ...

The oldest leech ever discovered has turned out to be a shape shifter of expectations, preserving a body plan that looks ...

Around 165 million years ago, a bizarre, armored dinosaur roamed the floodplains of North Africa. The unusual, 13-foot creature, named Spicomellus afer by paleontologists, was adorned with ...

A tadpole fossil, dating back over 160 million years, has been identified as the oldest ever found. Measuring an impressive 16 cm, this ancient specimen, discovered in Argentina, also forces ...

Scientists have unearthed in Mongolia the oldest and most complete fossil of a pachycephalosaur, a group of dinosaurs known for their dome-shaped skulls, according to a new study published Wednesday ...

A group of paleontologists unearthed the most complete fossil of a new species of a famed dome-headed dinosaur to date during a dig in Mongolia. The team found the pristine skeleton in the Khuren Dukh ...

A specimen discovered in Mongolia is the most complete fossil yet found of a pachycephalosaur, a dinosaur believed to be built for head-butting. The skull of Zavacephale rinpoche, a pachycephalosaur ...

A 430-million-year-old fossil reveals that the first leeches were ocean predators, not bloodsuckers. The discovery radically ...