Mammals Preyed on Dinosaurs?

Anonymous Howard writes "Nature is just one of many sites reporting that 130 million-year-old fossils unearthed in China suggest that contrary to conventional wisdom, some early mammals were large enough to prey on dinosaurs. Evidence? How about the fossil of a large badger-like animal with the bones of an entire baby dino in its gut?"

Comments

Evidence?

[Engineer-Poet]

Over at Pharyngula the claim is that the tooth structure and muscle attachments on the jaw indicate the strength that is characteristic of a carnivore, not a scavenger.