The classic picture; 2 dinosaurs clash in battle wilst the small and primitive mammal scurries off. With the following discovery the vivid image above is all but a myth.
Discovered in China, the 3 foot long Repenomamus lived 130 million years ago. Found inside the stomach of a well preserved individual was the skeleton of a juvenile Psittacosaurus dinosaur. This animal had clearly been torn apart before being eaten and was probably attacked by the mammal when alive.
This find proves that mammals ate dinosaurs for lunch on occasion. Repenomamus would still have fallen victim to larger predatory dinosaurs if it became too unwary.