The identification of a new species belonging to the marine mammal group Desmostylia has intensified the rare animal's brief mysterious journey through prehistoric time, finds a new study. A big, ...

A new genus, comprising two new species of desmostylians, is described from marine Oligocene deposits of the Pacific Northwest. Behemotops proteus, new genus, new species, is based on an immature ...

Fossils of an extinct creature that looked like a cross between a hippo and a walrus show it didn't chew its food like most mammals. It probably also ate with its mouth open and never used a coaster.

PORTLAND, Ore. (KOIN) — Rare fossils that likely came from extinct hippo-like mammals, which existed between 21 and 23 million years ago, were recently discovered by two different beachcombers on the ...

New fossils from the Aleutian Islands intensify the mystery surrounding a toothy, hippopotamus-sized mammal unique to the North Pacific. The oddball creature suction-fed shoreline vegetation, say ...