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Tyrannosaurus rex, the most famous dinosaur in popular culture and long considered the apex predator of its era, was apparently not alone. Thigh bone and tooth variations in assembled T-rex skeletons ...

'Suskityrannus gives us a glimpse into the evolution of tyrannosaurs just before they take over the planet,' said Sterling Nesbit. A new relative of the Tyrannosaurus rex-- much smaller than the huge, ...

EXCLUSIVE: Mark Witton also believes dinosaurs "may have been much smarter animals than we have given them credit for".

A study published this week proposes three species of Tyrannosaurus instead of the long-accepted single species rex. The researchers analyzed dozens of T. rex specimens, of which there are only about ...