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  1. Dinosaurs represent failure and extinction.
  2. Dinosaurs and "humans" coexisted.
  3. Dinosaurs were either all hot-blooded or all cold-blooded.
  4. The word dinosaur means "terrible-lizard."
  5. Whatever you read in the latest "dinosaur book" or see on T.V. or in the movies must be true.
  6. Dinosaurs all lived and died at the same time.
  7. Mammals arose after the dinosaurs, and helped drive the dinosaurs into extinction by eating dinosaur eggs.
  8. An asteroid (or comet) killed the dinosaurs.
  9. All big reptiles from the prehistoric past ("Monsters") are dinosaurs.
  10. Archaeologists dig up dinosaurs.

8. An asteroid (or comet) killed the dinosaurs.
The controversy over the cause of the dinosaur extinction continues among paleontologists. However, evidence from a deep sea core drilled off the coast of Florida proves that an asteroid hit the Earth at the end of the Cretaceous which caused the dinosaur extinction. Most dinosaur specialists are willing to accept that an asteroid hit the Earth, but some do not think that it was the sole cause of the Mesozoic extinctions. Instead, they claim that dinosaurian diversity was already in decline by the end of the Cretaceous. The asteroid impact may have been "the straw that broke the camel's back." 

Click here to learn more about dinosaur extinction theories.