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    Scientists Believe This Is Why T. Rex Had Tiny Arms

    May 21, 2026

    Scientists think they've figured out a great pre-historic mystery: how did the Tyrannosaurus rex grow to be so big, while maintaining teeny tiny arms? A new study by British researchers suggests that all the nutrition this dinosaur consumed went to the body parts that needed to be the biggest and strongest. Unfortunately for T. rex, that didn't include its arms. Inside Edition Digital’s Mara Montalbano has more.

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