Far bigger than any dog that walks the earth today, Epicyon haydeni dominated North America for millions of years before it ...

In a cave in eastern China, an exceptional fossil has been uncovered: that of a prehistoric cat so small it could have fit in the palm of a hand. This rare discovery opens a new window into the ...

Some were the size of a dog. Others were as large as polar bears. A newly-discovered fossil of the ferocious hyaenodont is helping scientists understand a little bit more about the mysterious ...

Modern Southern Appalachia was much warmer during the Pliocene epoch, which lured prehistoric mammal species ... While roughly the size of a cat, Miopetaurista webbi only weighed about 3 pounds.