Carnivorous Dinosaur Discovered in Utah Was a True Jurassic Nightmare

One of the things that really bugs me about the Jurassic Park movies is the prominent role given to Tyrannosaurus rex--a dinosaur that didn't appear until the ensuing Cretaceous period. I am therefore thrilled to learn about Allosaurus jimmadseni, a newly described apex predator that, unlike T. rex, actually lived...