Megalodon teeth have been collected for hundreds of years. During the renaissance, some people thought that they were the petrified tongues of dragons and snakes, but in 1667, the Danish scientist Nicolaus Steno recognized them as shark teeth. The famous Swiss zoologist Louis Agassiz, was the first to notice the similarity of the teeth of megalodon to those of the great white shark, and so called it Carcharodon megalodon, although some zoologists still think that megalodon is more closely related to the modern shark Carcharocles, and should be called ‘Carcharocles megalodon’.
Teeth of megalodon can be found preserved in the rocks along parts of the US east coast. The tooth of megalodon is the state fossil of North Carolina.