Epicyon haydeni, or Hayden’s bone-crushing dog, roamed North America between 12 and 6 million years ago during the middle to late Miocene epoch. Its fossils have been discovered in at least 12 ...

A fearsome, wolf-size otter with a large head and a powerful jaw once swam around the shallow, swampy waters of ancient China, likely hunting for clams and other shellfish, a new study finds. The ...

Coyotes and wolves share a closely related evolutionary history. But if you study coyote vs. wolf characteristics further, you'll discover there are important differences between the two canid species ...