The asteroid that killed the dinosaurs hit Earth at about 45,000 mph.
Fact #11450
More Dinosaur Facts
Dinosaurs ruled Earth for about 165 million years.
Fact #11451 · Dinosaur
Birds are dinosaurs — every chicken alive today is a living dinosaur.
Fact #11445 · Dinosaur
A Tyrannosaurus rex tooth was about the size of a banana, including the root.
Fact #11442 · Dinosaur
T. rex lived closer in time to us than to Stegosaurus.
Fact #11446 · Dinosaur
Some dinosaurs replaced their teeth every two weeks throughout life.
Fact #11448 · Dinosaur
Stegosaurus had a brain about the size of a walnut.
Fact #11447 · Dinosaur
Argentinosaurus weighed roughly as much as ten African elephants.
Fact #11444 · Dinosaur
Pterosaurs and plesiosaurs weren't actually dinosaurs.
Fact #11449 · Dinosaur
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