Coelophysis was a slender carnivorous dinosaur that lived during a time when Earth looked nothing like it does today. Fossil discoveries in the southwestern United States have made it one of the ...

Learning how pronghorn survived the climate changes that ended the ice ages anddrove so many other large mammals to extinction can help us adapt to our ownchanging climate.

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New research shows Tyrannosaurus rex took nearly 40 years to reach full size, 15 years longer than previously believed, ...

Cryolophosaurus was one of the earliest large carnivorous dinosaurs, thriving in what was once a cool, forested Antarctica. Fossil evidence shows it stood at the top of the food chain during a ...