A new hypothesis for the evolution of the T. rex’s short arms was formulated by Kevin Padian, UC Berkeley professor emeritus of integrative biology and curator of paleontology at the UC Museum of ...
A new analysis of fossils believed to be juveniles of T. rex now shows they were adults of a small tyrannosaur, with narrower jaws, longer legs, and bigger arms than T. rex. The species, Nanotyrannus ...
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