T-rex may have used small arms for mating, discovery of Meraxes

There has been much speculation about why some dinosaurs had small arms. The unearthing of a well-preserved relation of the T-rex has shed more light on the species.
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Why These 4 Massive Dinosaurs Also Had the Tiniest Arms

Why Did Dinosaurs Like T. Rex Have Such Tiny Arms?

Why did dinosaurs have small arms?

New dinosaur species was discovered by paleontologists, named the giant carnivorous dinosaur species Meraxes gigas. - ABC7 Chicago

This big dino had tiny arms before T. rex made them cool

This big dino had tiny arms before T. rex made them cool

T. Rex's Tiny Arms May Have Been Vicious Weapons

Tyrannosaurus rex (Feathered Deluxe by CollectA) – Dinosaur Toy Blog

Meraxes Gigas: Giant New Carnivorous Dinosaur Discovered With Tiny Arms Like T. rex