Study reveals real reason T. rex had tiny arms: Massive skulls took over the hunt

Researchers proposed a new biomechanical explanation for why T. rex had tiny forelimbs.

The idea is that smaller arms may have been less likely to be injured or bitten off during group feeding with other large predators.

The hypothesis is still unconfirmed and needs biomechanical testing, but it offers a testable answer to a long-standing dinosaur puzzle.

If supported, it could change how scientists think about feeding behavior, injury risk, and forelimb reduction in tyrannosaur evolution.