Deinonychus was a spectacular, but fairly small dinosaur. It was a fast and vicious hunter. Its name means 'terrible claw,' and it was given this name because of the large, retractable hunting claw on each of its feet. Like its cousin, the Velociraptor, it used this claw to tear into the flesh of the dinosaurs it hunted. The claw would snap forward and make a large, deep wound when it attacked. Deinonychus was about twice as big as Velociraptor. Shed teeth and several specimens of Deinonychus were found with the skeleton of a large plant eating dinosaur, Tenontosaurus. Some authorities maintain that this established that they hunted in packs, ones capable of bringing down animals much larger than themselves. This 3d model of the dinosaur was made in Blender 2.68.