rich enamel the key to a beaver's super strong teeth

February 12, 2015 10:03 PM

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Despite a lifetime's worth of gnawing on massive tree trunks, beavers are essentially immune to tooth decay; and that's because they've got tiny iron-rich nanowires interwoven throughout the enamel core of those outsized incisors.

In studying the composition of beavers' front teeth -- as well as other types of enamel -- researchers were able for the first time reveal the chemical contribution these amorphous internal wires offer.

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