Shark Teeth Have Built-In Toothpaste

The dense, flat, crushing teeth of sharks contain fluoride helping to keep their impressive mouths clean and free of cavities and other problems.

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Image credit: Corbis

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    Sharks? They are awesome. Carry on.
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    Shark Week
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  30. sharkweek reblogged this from discoverynews and added:
    All about shark teeth. Jawsome.
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    But apparently, herpes is out of the question