Prehistoric Beaver Discovered in Mongolia

Dino Beaver, a.k.a.: Castorocauda lutrasimilis

A prehistoric beaver was recently unearthed in Mongolia. Scientists believe this may be the oldest aquatic mammal ever discovered, but it is NOT a precursor to modern day beavers and otters.

From the article on the FOX web site:

Although Castorocauda bears many similarities to beavers, otters, and platypuses, it's not an ancestor of any of them. It is what scientists sometimes call a "dead-end species."

But then, aren't they all?

Read more about the ancient beaver here: A Mammal Swam With the Dinosaurs