Gliding Jurassic Mammals, Huge Dinosaurs and Ice Age Birds

摘要

Perfectly preserved remains of gliding mammals have been dated to 160 million years ago. The mammals that lived in the shadows of the dinosaurs were always depicted as small, shrew-like beasts. We now have clear evidence that early mammals had diversified into a number of specialised niches, such as aquatic forms like the beaverine Castrocauda from the Jurassic of Mongolia, and large predatory forms like Repanomamus from the Cretaceous.