Ornitholestes is a dinosaur that is noted for using its hands to grasp its prey. Each of the fingers had razor sharp claws. The animal weighed about 35 pounds and grew to a length of about 6 feet.
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While Mammoths and Saber Toothed Tigers died out long ago, modern mammals are increasingly at risk of extinction due to human intervention. Explore some species that are no longer with us.
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Triceratops is one of the most spectacular and well known of all dinosaurs. It lived to the end of the Cretaceous. Triceratops was the largest of the ceratopsians. Learn more about the Triceratops and other Late Cretaceous dinosaurs.