Ancient four-legged whales once roamed land and sea
(PHYSorg.com Archaeology & Fossils)

Whales belong in the ocean, right? That may be true today, but cetaceans (whales, dolphins, porpoises) actually descended from four legged mammals that once lived on land. New research published in Current Biology reports the discovery in Peru of an entirely new species of ancestral whale that straddled land and sea, providing insight into the weird evolutionary journey of our mammalian friends.