Dinosaurs are a group of reptiles that first appeared about 245 million years ago. They dominated the planet until an extinction event wiped out a large swath of life on Earth about 66 million years ago. But now we know that the Age of Dinosaurs never ended.
Instead, a group of dinosaurs gave rise to a new, small airborne form: birds. Find out more from the American Museum of Natural History, home of the world's largest collection of dinosaur fossils.
(via TISOTIT)
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