Tyrannosaurus rex should be split into three species
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Carnivorous Dino Guide
T. rex gets new home in shakeup of dino family tree, Science
T. rex may have had 2 equally terrifying sibling species, new research suggests
Controversial paper suggests there are three Tyrannosaurus species
Study refutes claim that T. rex was three separate species
Dinosaur Bone Study Reveals That Not All Giants Grew Alike
The Tyrannosaurus Trifecta: Questions Regarding T-rex's Species Split – Max's Blogo-Saurus
Mini tyrannosaur fills big evolutionary gap
Tyrannosaurus Rex Footprint Discovered Next to Giant U.S. Volcano Crater
Major Groups of Dinosaurs - Fossils and Paleontology (U.S. National Park Service)
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