Why did T. rex have tiny arms? A new study may finally have the answer

An analysis of 85 dinosaur species shows that tiny forearms in meat-eating dinosaurs were the result of an evolutionary trade ...
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The secret behind the disproportionate limbs of the prehistoric T rex revealed in new evolutionary study

A new study published by The Royal Society reveals the disproportionate arms of a T. rex can be linked directly to evolution.

Scientists say they may have discovered why T. rex had such small arms: “Evolution doesn’t like to have everything all at once”

A new study suggests Tyrannosaurus rex’s tiny arms were the evolutionary price of developing a gigantic head and a devastating bite.
Phys.org

T. rex's direct ancestor crossed from Asia to North America, new study finds

Tyrannosaurus rex evolved in North America, but its direct ancestor came from Asia, crossing a land bridge connecting the continents more than 70 million years ago, according to a new study led by UCL ...