Carchrodon megalodon was a shark that ruled the oceans of the Miocene and Pliocene epochs, roughly 25 to 1.6 million years ago, but some scientist believe that it lived during the late Pleistocene or early Holocene epochs or about 10,000 years ago. Now extinct, but the time of extinction is highly debated. Some scientists believe that there could be a few alive today in the deep trenches of the Pacific Ocean, neat the rifts between the Pacific and Philippine geological plates, but this is only in theory. It is believed that the megalodon is a ancester of out Great White Shark, but new evidence indicates that is not an ancestor and would be of the genus Charchocles instead of Charcharodon.

If a megalodon were alive today, it could destroy many of the whale species that are alive. These were its main food. Fossilized teeth from the megalodon have been found up to 6.5 inches or 17cm long in every part of the world. By these teeth, scientist have determined that the mouth of this shark would be about 6 feet (1.8m) wide and 7 feet ( 2.1m). There would have been hundreds of teeth with serrations. This shark would be about 40 feet (12m) or longer, a few scientist have estimated the shark could have reached lengths of 50 to 100 feet (15.5 to 31 m). The megalodon could easy swallow a Great White or even a man. The weight could go 20 to 50 tons depending upon the size of the shark.

Here are two pictures of Meg teeth: One a picture of a person holding a Meg tooth and one of two meg teeth compaired to the tooth of a Great White Shark.