Some were the size of a dog. Others were as large as polar bears. A newly-discovered fossil of the ferocious hyaenodont is ...

Sex is real, and it matters. In sport, this elemental truth cannot be affirmed loudly enough. It is impossible to mount any ...

So, what was a third eyelid doing in a human? Most refer to such bits of tissue as vestigial. The word means a structure that ...

Peronia watts is now one of four species that call northern Australia home, with an additional two Peronia species native to ...

One big cat in the U.S. stands out for its extraordinary jumping ability clearing over 20 feet in a single leap thanks to powerful hind legs flexible spines and perfect muscle coordination.

A nearly complete skull fossil found in Egypt has revealed a new species of Hyaenodonta, an apex carnivore that mysteriously ...

The Boston terrier and French bulldog have many differences, including head and ear shape, size and weight, coat color, and temperament.

Looking for random tidbits to bring out at your next dinner party? Here are 167 random fun facts suitable for anyone in your ...

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Those changes helped determine the cat and dog predators seen today ... They have really big heads that were just covered in muscle,” said study coauthor Dr. Matthew Borths, curator of fossils ...