This prehistoric carnivore had teeth like steak knives
Before dinosaurs walked the Earth, there was a meat-loving beast called Dimetrodon, which researchers just determined had the first known serrated “steak knife” teeth. Dimetrodon lived at what are now the southwestern United States and parts of Europe between 298 million and 272 million years ago. (The first dinosaurs evolved from other animals some 40…
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Jennifer Viegas — Discovery News