Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. About 125 million years ago, a carnivorous mammal and a large ...

Conventional wisdom has always held that in prehistoric periods when early mammals lived alongside dinosaurs, that those mammals were generally meek and avoided their reptile overlords for fear of ...

WASHINGTON (Reuters) - While there is little doubt that many a Mesozoic mammal became a meal for a dinosaur, it may come as a surprise to learn that some mammals also dined on dinos. A dramatic fossil ...

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A new fossil shows a badger-like mammal biting into a dinosaur. The mammal was significantly smaller than the dinosaur and may have hunted in packs or solo. Researchers thought dinosaurs attacked ...

Scientists have identified a fossil of an herbivorous dinosaur, Psittacosaurus, being bitten by a mammal, Repenomamus. When dinosaurs ruled the Earth, we tend to think of the mammals at the time — ...

Paleontologists Susannah Maidment and Chinzorig Tsogtbaatar share details about some of the cool dinosaurs discovered last year.