Although they laid eggs like reptiles, they were warm-blooded, which links them closer to mammals. Their bodies, about 3.3 feet (1 meter) long, resembled a dog without ears or fur, but with saber-like ...

The remains of the oldest gorgonopsian ever discovered unveil the secrets of a formidable predator, at the crossroads between reptiles and mammals. 270 million years ago, Majorca was not an island ...