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Cretaceous period

The extinction of the dinosaurs. Illustration: shutterstock

The dinosaurs thrived before the asteroid hit wiped them out

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A Coranan dinosaur, lived in the continent of "Eastern North America" ​​which was isolated from the West by a sea that cut America in two. Image: University of Bath

A horned dinosaur fossil has been discovered, confirming the theory that during the Cretaceous period a sea separated eastern North America from the western coast

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