New fossils intensify mystery of short-lived, toothy mammals unique to ancient North Pacific

Desmo, Ray Troll, Louis Jacobs, SMU, AlaskaIdentification of a new species of marine mammal has intensified the rare animal’s brief mysterious journey through prehistoric time. A big, hippo-sized animal with a long snout and tusks — the new species is a marine mammal belonging to the order Desmostylia.