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T. rex’s incredible biting force came from its stiff lower jawA small bone in the mandible helped brace an otherwise flexible jointThe fearsome Tyrannosaurus rex could generate tremendous bone-crushing bite forces thanks to a stiff lower jaw. That stiffness stemmed from a boomerang-shaped bit of bone that braced what would have been an otherwise flexible jawbone, a new analysis suggests.Unlike mammals, reptiles and their close kin have a joint dubbed the intramandibular joint within their lower jawbone, or mandible. New computer simulations show that with a bone spanning the IMJ, T. Rex could have generated bite forces of more than...

T Rextacy at it's height.

In the first analysis of proteins extracted from dinosaur bones, scientists say they have established more firmly than ever that the closest living relatives of the mighty predator Tyrannosaurus rex are modern birds.

Ancestors of the fearsome Tyrannosaurus rex were clothed in delicate feathers, a fossil discovered in China suggests. The find may come as a surprise to people used to images of Tyrannosaurus as a scaly monster. But many palaeontologists have been predicting just such a find ever since the first evidence of a dinosaur with a feathery coat came from the same site in Liaoning in 1995. The 130 million-year-old fossil is the oldest member recorded from the tyrannosauroid family, and the first in the group with a feather-like covering. The discovery of its skull and other fragments is reported today...