Dinosaurs may have roamed the northern hemisphere millions of years earlier than previously thought
How and when did dinosaurs first emerge and spread across the planet more than 200 million years ago? That question has for ...
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The Cretaceous Period: What was Earth like before dinosaurs went extinct?
You might know the Cretaceous Period for big animals such as Tyrannosaurus rex and Triceratops, or for being the end of the age of dinosaurs. But what was the world like in the millions of years ...