Nearly 42 million years ago, a fearsome bobcat-sized creature prowled the forests of what is now San Diego. Unlike most mammals at the time, it was a hypercarnivore, built to eat meat and almost only ...

A giant lion with enormous fangs that roamed the Kenyan savannah more than 20 million years ago was one of the largest ever meat-eating mammals, researchers said Thursday. A team unearthed the lower ...

Paleontologists recently spotted a suspiciously bare patch of land on a Brazilian farm on Google Maps, and they headed out to dig for fossils. This terrifying-looking creature, a dog-sized predator ...

New fossils from Belgium have shed light on the origin of some of the most well-known, and well-loved, modern mammals. Cats and dogs, as well as other carnivorous mammals (like bears, seals, and ...

Illustration showing Repenomamus robustus as it attacks Psittacosaurus lujiatunensis moments before a volcanic debris flow buries them both, ca. 125 million years ago. (Michael Skrepnick via ...