Tyrannosaurus vs Giganotosaurus: Who is the Superior Killing Machine?

While Tyrannosaurus has long been hailed as the king of the dinosaurs, its crown has come under scrutiny. The challenger? Giganotosaurus, an animal even larger than T-rex.

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The 100 Year Old Dinosaur Mystery

Over 100 years ago, a monster was discovered in the deserts of Egypt. Only recently has the elusive theropod become a staple of paleontology.