Jurassic world AgeBack- Planet of Big Reptiles

Dinosaurs ruled the Earth for 135 million years. There were many types of dinosaurs, in all shapes and sizes.Millions of years ago, long before there were any people, there were dinosaurs. Dinosaurs were one of several kinds of prehistoric reptiles that lived during the Mesozoic Era, the “Age of Reptiles.”

There were lots of different kinds of dinosaurs that lived at different times.

Some walked on two legs (they were bipedal), some walked on four . Some could do both.

Some were speedy ,and some were slow and lumbering

Some were armor-plated, some had horns, crests, spikes, or frills.

Some had thick, bumpy skin, and some even had primitive feathers.

The dinosaurs went extinct about 65 million years ago, at the end of the Cretaceous period, which was a time of high volcanic and tectonic activity. There are a lot of theories why the extinction occurred. The most widely accepted theory is that an asteroid impact caused major climactic changes to which the dinosaurs couldn’t adapt.

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