Dinosaurs lived between 220 and 65 million years ago. The dinosaur age
is Mesozoic, although in fact they didn't evolve before the end of
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The oldest dinosaurs were lizard-hipped. They included the massive
plant eaters Sauropods - the largest animals that have ever lived on
the Earth; and the meat-eating Theropods that walked on two leggs and
were fast runners.
The later dinosaurs included the bird-hipped Ornithopods, and armoured
dinosaurs such as Stegosaurs, hornheads and boneheads. They were all
Threopods (the earlier dinosaurs) had three fingers, while Ornithopods
(the later dinosaurs) had five.
Some species of dinosaurs had hear and feathers, some had wrinkled,
About 500 species of dinosaurs
have been discovered and named so far, but there are thought to be at
There are many theories about why
dinosaurs got extinct. The more popular ones
suggest a catastrophe, such as meteorite strike or very active
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