| Africa is a rich source of dinosaur fossils. A site in Tanzania has held some major discoveries. |
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| Although dinosaurs were reptiles, much of their behavior, such as agile running, has more in common with mammals. |
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| Brain size is not always a sign of intelligence, but big-brained Troodon was probably one of the smartest dinosaurs. |
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| Crests, frills, horns, and spikes adorned the heads of many dinosaurs. These decorations helped dinosaurs identify one another and were sometimes used for signaling. |
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| Crocodiles were around before the dinosaurs, and are still alive today. |
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| Dinosaur embryos have been found fossilised in their eggs. |
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| Dinosaurs are divided into two groups based on the shape of their hips, saurischians (lizard-hipped) and ornithischians (bird-hipped). |
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| Dinosaurs became extinct around 65 million years ago. |
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| Dinosaurs became extinct over 60 million years before the first humans existed. |
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| Dinosaurs held their legs directly beneath the body, unlike other reptiles, which crawl with their legs held out from the sides of the body. |
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| Dinosaurs thrived for 150 million years. |
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| Heavier than eight elephants and more than 80 ft (24 m) long, Barosaurus was one of the biggest dinosaurs. |
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| Scientists now recognise birds as the closest living relatives of dinosaurs. |
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| Several groups of reptiles existed before dinosaurs appeared. |
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| Some dinosaurs may have lived for 200 years. |
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| Some of the plants dinosaurs ate, such as pine trees, ferns, and cycads, still grow today. |
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| Stegosaurus had a brain no larger than a golf ball. |
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| The cheek teeth of Stegosaurus were leaf-shaped. |
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| The earliest known dinosaur, Eoraptor, first appeared 228 million years ago. |
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| The first dinosaurs were all carnivores. |
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| The name ornithomimosaur means - bird-mimic reptile. |
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| There were about thirty times more herbivores than carnivores. |
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| Tyrannosaurus rex is the largest land-living carnivore we know of. |
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| We do not know if dinosaurs could see in color. |
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| When running, Tyrannosaurus rex would have held its tail rigid for balance. |
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| While the dinosaurs ruled the land, their reptile relatives, the pterosaurs, ruled the air above, and the ichthyosaurs and plesiosaurs ruled the oceans. Dinosaurs did not fly or live in water. |
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