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Tyrannosaurus rex may have been three separate species, say scientists

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Researchers have controversially argued there is enough variation in samples to point towards three species of Tyrannosaur, not one.
Tyrannosaurus rex may have been three separate species, say scientists
The T.rex was a massive coward – and we have the footage to prove it - BBC Science Focus Magazine
Tyrannosaurus rex may have been three separate species, say scientists
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Tyrannosaurus rex may have been three separate species, say scientists
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Tyrannosaurus rex may have been three separate species, say scientists
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Tyrannosaurus rex may have been three separate species, say scientists
Is T. rex really three different species? There's debate.
Tyrannosaurus rex may have been three separate species, say scientists
Tyrannosaurus rex may have been three species, scientists claim
Tyrannosaurus rex may have been three separate species, say scientists
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Tyrannosaurus rex may have been three separate species, say scientists
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Tyrannosaurus rex may have been three separate species, say scientists
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Tyrannosaurus rex may have been three separate species, say scientists
Scientists propose Tyrannosaurus had three species, not just 'rex
Tyrannosaurus rex may have been three separate species, say scientists
Newly-Discovered Tyrannosaur Species Fills Gap in Lineage Leading to Tyrannosaurus rex
Tyrannosaurus rex may have been three separate species, say scientists
Scientists propose Tyrannosaurus had three species, not just 'rex
Tyrannosaurus rex may have been three separate species, say scientists
They Want to Break T. Rex Into 3 Species. Paleontologists Aren't Pleased. - The New York Times
Tyrannosaurus rex may have been three separate species, say scientists
Fossils Show Dismembered Young Dinosaurs in Belly of T. Rex Cousin
Tyrannosaurus rex may have been three separate species, say scientists
Small 'cousins' of T. rex may actually have been growing teenagers
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