If you thought T-Rex was the scariest dinosaur - think again. Paleontologist Dr. Phillip Currie believes he has found a six-ton flesh-eating dinosaur that hunted its prey in packs. Recently there was little evidence to support Currie's ideas. But that's all changed now he has twomass dinosaur graves on his hands. The site in Canada was originally found by one of the best known characters of the golden age of dinosaur discovery.