Dinosaur
Definition 1 of 2
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Extinction Impact
Understanding 'dinosaur' stresses how something no longer exists. There are no dinosaurs left on Earth.
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Long Ago Era
Refers to creatures from a very distant past, millions of years ago. Dinosaurs roamed during the Mesozoic Era.
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Varied Sizes
Not all dinosaurs were giants; some were as small as chickens. The Compsognathus was a small dinosaur.