Fossils found in New Mexico belong to a previously undiscovered species of small tyrannosauroids that lived 92 million years ago, cousins of the much larger Tyrannosaurus rex. They shed light on how these dinosaurs evolved from tiny to the top of the food chain, a new study says.
Tyrannosaurus rex, like the kind wreaking havoc in "Jurassic Park," reigned as king of the dinosaurs between 66 million and 80 million years ago. But it wasn't always the top predator.
The origins of tyrannosaurs are...
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