A fossil of the 23-foot-tall predator could help unlock secrets of an order of dinosaurs that remain poorly understood.
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Gigantic dinosaur with 'claws like hedge trimmers' found with croc leg still in its jaws in Argentina
Speedy megaraptor Joaquinraptor casali had big arms and claws like hedge trimmers that would have made T. rex's forelimbs look puny.
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