Have you ever wondered why some dinos are mad, like in our Origami Red Angry Tyrannosaur cursor pack? As you might know, the Tyrannosaur rex was primarily a predator or a scavenger. You can notice in nature that most predators are angry because they are hungry. Fossil clues, such as bite marks and tooth-wear patterns, give us a clear insight into how T. rex lived and what it ate. These clues suggest that tyrannosaurs were gregarious but sometimes fought viciously with one another.