Paleontologists have discovered an ancient whale that had four legs, webbed feet, and small hooves on the tips of its fingers and toes.
The creature, named Peregocetus pacificus, had sharp teeth for hunting fish and could both walk on land and swim in the sea.
A new study about this whale ancestor may force scientists to rethink how these creatures migrated 40 to 50 million years ago.
Ancient whales, the study authors suggest, crossed the Atlantic Ocean from Africa and swam to South America before traveling north.
At first glance, the four-legged creature above might seem like an otter or a platypus.
But in fact, it's an ancient, 13-foot-long whale that lived 42.6 million years ago.