A new study has found that the T. rex's arms evolved to become smaller at the same time as its head grew to catch more prey ...

A new study suggests T rex's short forelimbs were an evolutionary adaptation to prevent accidental amputation during group ...

Why did T. rex have such tiny arms? Scientists now think it’s because its giant head became the ultimate hunting tool. Across ...

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 ...

T. rex and other giant dinosaurs evolved tiny arms because their skulls and bites became powerful enough to replace forelimbs ...

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 ...

During their reign of dominance on Earth for more than 160 million years, dinosaurs evolved into many diverse species. Although some species were vegetarian and harmless, others were fierce carnivores ...