Tyrannosaurs hunted in packs, making them even more terrifying

It's hard to imagine an ancient creature that would terrify you more than a tyrannosaur. The mighty Tyrannosaurus rex is the most icon of all the dinosaurs but it's just one member of a larger family of carnivorous dinosaurs referred to as tyrannosaurs. Many of them were massive in size and while debate continues to rage over whether or not they were active hunters or primarily scavengers, they are almost always depicted in both fictional and historic light as being solitary. Now, new research p...