The Entelodont, the largest prehistoric pig to inhabit North America in the Eocene Period, could grow up to the size of a ...

The bone had thick walls and a narrower bone marrow cavity. The thicker walls function as ballast that helps semiaquatic animals dive. In contrast, echidna bones are much lighter.

Virginia opossums are the only marsupial species in North America.

Researchers have discovered a new genus and species of prehistoric mole in Spain. Vulcanoscaptor ninoti lived during the ...

That the average pre-asteroid mammal was puppy-scale did not sit well with a male Victorian view of evolution as a struggle for “dominance” won by large animals — your megalosauruses and ...

A fossil shows a mammal biting into a dinosaur. The Repenomamus robustus appears to be attacking the Psittacosaurus, though it's much smaller.

The mammal died while biting two of the dinosaur’s left anterior dorsal ribs; its mandible plunges downward into the indurated sediment to firmly clasp the bones (Fig. 1; Supplementary Fig. S9).

A 72 million-year-old fossil found near the Utah-Colorado border led to the discovery of a new muskrat-sized mammal species named Heleocola. The discovery was made by paleontologists from multiple ...

Eventually, this intensive review of the fossils resulted in the identification of the three new prehistoric mammal species of prehistoric mammals, each with a unique set of dental features. Atteberry ...

They are likely Florida’s tallest land mammal, according to the Florida Museum, standing about 13-feet-tall at the shoulder and an additional 5 or 6 feet for the neck. Where fossils were found: ...

The prehistoric skirmish took place around 125 million years ago, in what’s now northeastern China, and appears to be something like a man-bites-dog story of the dinosaur era.

Echidnas are quill-covered mammals that are native to Australia and New Guinea. They lay eggs like their platypus cousins, and they have spines like porcupines, but they're a unique species all their ...