Extinct species news, features and articles

The armor-plated lizard is an ancestor of modern crocodiles and lived just before dinosaurs took over Earth.

Researchers have gained new insights into rhinoceros evolution and the longevity of the North Atlantic Land Bridge from analyzing the perfectly preserved fossils of a "frosty" Arctic rhino.

An argument over whether fossils from several small dinosaurs represent a juvenile Tyrannosaurus rex or smaller adults of a separate species may finally be settled.

Researchers have unearthed two dinosaur "mummies" in the badlands of Wyoming, confirming duck-billed dinosaurs had hooves, alongside a string of other discoveries.

New dating has revealed that New Mexico's last dinosaurs were healthy, diverse and thriving at the end of the Cretaceous period, suggesting non-avian dinosaurs weren't in decline before being snuffed out by the asteroid strike.

The newly discovered ichthyosaur dubbed Xiphodracon goldencapsis was about 10 feet long and had a sword-shaped snout.

Researchers have discovered a mysterious ancient lizard with snake-like teeth in Scotland. Breugnathair elgolensis is one of the oldest relatively complete lizard fossils and helps scientists better understand the origins of snakes in the Jurassic period.

Researchers have described a whole new family of extinct crocodyliforms based on the fossilized remains of a single teenage croc named Elton discovered in the Blackleaf Formation.

Speedy megaraptor Joaquinraptor casali had big arms and claws like hedge trimmers that would have made T. rex's forelimbs look puny.

The juvenile pachycephalosaurs, which predates the previous oldest dome-headed dinosaur by 15 million years, reveals more about how and when this unusual feature developed.