This fossil discovered in China's Liaoning Province provides evidence that some mammals may have hunted dinosaurs for dinner. It shows a badger-like creature locked in mortal combat with a much larger beaked dinosaur, with the mammal biting two of the dinosaur's anterior dorsal ribs. This is the first evidence of actual predatory behavior by a mammal on a dinosaur, challenging the long-held belief that dinosaurs were the dominant species on land.