Repenomamus giganticus was a large-for-the-day mammal that has recently been shown to have EATEN DINOSAURS. Go early mammals!! Follow the links to learn more about it.
Large Mesozoic mammals fed on young dinosaurs (Nature article 2005)
Large mammals once dined on dinosaurs
Dinosaur found in mammal's belly
When dinosaurs ruled, mammals ate (a little) one
Early mammal dined on dinosaurs
