Tyrannosaurus-Rex is probably the most well known dinosaur in the world. Discovered in 1905 by Barnum Brown, the Tyrant Lizard King has been terrifying and intriguing people around the world ever since. Standing 20 feet tall and weighing 7 tons, Tyrannosaurus-Rex was the largest predator of the Late Cretaceous.

Colossal Squid Mesonychoteuthis Hamiltoni Range: oceans surrounding Antarctica Diet: Patagonian toothfish Life span: no one knows; only one colossal squid has been seen alive.        As the largest cephalopod in the world, the colossal squid reaches about 33 feet in length and weighs about 1,091 pounds.