The Jurassic Period is one of the three prehistoric geological periods of the Mesozoic Era. It spans from 145 million to 201 million years ago. This period was preceded by the Triassic Period and ...
WASHINGTON (Reuters) - On the perilous Jurassic Period landscape of western North America, it was good to be big. Your life may have depended upon it. Paleontologists have conducted a study ...
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