• The Mesozoic Era was the age of reptiles.
  • Dinosaurs filled all the niches that are currently filled by mammals.
  • Most dinosaurs lived on land, but pterosaurs flew the skies.
  • Feathered dinosaurs gave rise to birds.
  • The evolution of the amniote egg allowed them to lay their eggs on dry land.
  • The most famous mass extinction was 65 million years ago.
  • About 50% of all animal species died off.
  • Most scientists think that the extinction was caused by a giant meteorite that struck Earth.
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