While giant herbivores ruled the earth, giant carnivores ruled the seas. One such carnivore was the tremendous Carcharodon megalodon. As imposing as the great white shark is now, Carcharodon megalodon was even more so. Each one of Carcharodon megalodon 's teeth was about the size of the palm of your hand. It had jaws six feet across! (The jaw of the great white shark is "only" two feet across). The length of Carcharodon megalodon was probably about 66 feet long, double the size of a great white shark. Sharks started to evolve during the Devonian period. They were more effective hunters than the other jawed-fish hunters of that day and age, because they were better streamlined. One of these new terrors was Cladoselache, which was about 6 and a half feet in length. It had a strong tail, which allowed for powerful swimming. A larger breed of sharks emerged during the Permian. Hybodus was 8 feet long. It had claspers (male reproductive organs) and special hooks on its head to attach to females during mating. When Hybodus died out at the end of the Cretaceous, new and larger sharks came to be. This is when Carcharodon megalodon appeared. Carcharodon megalodon lasted until the middle of the Pleistocene, so our ancestors may have had a sight of this Shark of Terror	A comparison of teeth between Carcharodon Megalodon (left) and the Great White Shark (right).

Cenozoic Era: Tertiary Period: Miocene Epoch: Creature Feature