Jurassic Beavers Challenge Current Mammal Theories

Bombula writes "According to a BBC article, Castorocauda lutrasimilis, a beaver-like creature discovered in the Jiulongshan Formation in China which apparently lived 164 million years ago, poses challenges to conventional theory of mammalian history. That is, of course, assuming this is a genuine fossil - no small assumption, given Chinese fossils' track record of forgery, fabrication, and fraud."