‘Dueling Dinosaurs’ Fossil Solves the Mystery of a ‘Mini T. rex’ An analysis suggests Nanotyrannus is a separate, smaller dinosaur that lived alongside T. rex, settling a 30-year debate By Anirban Mukhopadhyay edited by Sarah Lewin Frasier Nanotyrannus appears to be a separate, smaller relative of Tyrannosaurus rex that shared its habitat. This illustration visualizes…