UCL scientists studied 82 theropod species to discover why the terrifying predator, the Tyrannosaurus rex, had such short arms. New Delhi: The Tyrannosaurus rex is known to be a fearsome predator, but in comparison to its enormous size, its tiny arms have left scientists puzzled. However, the mystery may have finally been solved. A study published on 20 May in the journal Pro... [2337 chars]