Dinosaurs

Dinosaurs were animals that were on the Earth for over 160 million years. They first appeared about 230 million years ago. About 65 million years ago, at the end of the Cretaceous Period, a catastrophic event occurred and the dinosaurs became extinct.

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Aucasaurus © Mariana Ruiz Villarreal Aucasaurus was a medium-sized dinosaur. It was around 4 metres (13 feet) long and 1 metre (3 feet) high at the hip, weighing around 700 kilogramsg (1,500 pounds).