More details have been revealed about the new carnivorous dinosaur featured in this summer's Jurassic World. Called the Indominus Rex (aka Fierce or Untamable King), the creature stands at a length of 40 feet and most closely resembles the Tyrannosaurus Rex. Its biography on the official Jurassic World website, however, explains that its horns, head structure, and thick, bony skin make it different from the massive predator featured in previous Jurassic Park films. The Indominus Rex was created by genetic engineers at the Hammond Creation Lab using genes from a variety of dinosaurs, including Carnotaurus, Majungasaurus, Rugops, and Gigantosaurus, we're told.