by Tsing Mui on August 7, 2012 at 2:20 pm
Sharp. Pointy. Scary. These are some of the terms that come to mind when visualizing a shark’s gaping jaw and intimidating teeth, but now you can add this to the list: clean! Recent research has found that the teeth of sharks are covered in fluoride, the exact same ingredient used in toothpaste for preventing cavities. Coupled with the fact that their teeth are regularly shed and renewed, sharks are always at their prime in regard to tearing and cutting prey.
Photo: Ian Waldie/Getty