The Tyrannosaurus rex may be among the most well-known and terrifying dinosaurs to walk the Earth, but a newly discovered 4-foot cousin was likely just as scary. Known as Moros Intrepidus (which means "harbinger of doom"), this tiny tyrannosaur lived 100 million years ago. Despite its diminutive size, it was still lethal, North Carolina State University paleontoloist Lindsay Zanno said. “Moros was lightweight and exceptionally fast,” Zanno said in a statement. “These adaptations, together with advanced sensory capabilities, are the mark of a formidable predator. It could easily have run down prey, while avoiding confrontation with the top predators of...