The Jurassic period is the second segment of the Mesozoic era. It took place from 199.6 to 145 million years ago, after the Triassic and before the Cretaceous.

Born in the Triassic, dinosaurs have until the end of the Cretaceous to evolve and assert their domination.

They became giants, who ruled the planet for 160 million years. A rare success, the human line is only 6 million years old.

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During the Jurassic period, the supercontinent Pangea broke up. The northern half, known as Laurentia, divides into landmasses that will eventually form North America and Eurasia

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The largest dinosaurs of the time and in fact, the largest land animals of all time, were the gigantic sauropods, such as the famous Diplodocus or Brachiosaurus. Other herbivorous Jurassic dinosaurs included Stegosaurs.

Allosaurus was one of the most common carnivores in North America, many intact skeletons have been found in Utah fossil beds.

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