Scientists have found that tooth enamel may have evolved from ancient fish scales and bones! How did that happen?
Disturbing Places Teeth Can Grow ►►►►
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How the enamel that coats your teeth evolved
“The hardest bit of your body is the enamel coating your teeth. But new analyses of fish fossils, as well as genetic analyses of a living fish species, suggest that this specialized material once served a very different function: to toughen some bones and scales of ancient fish.”
Shark Teeth Have Built-In Toothpaste
“The outside of shark teeth is made up of fluoride, the active component of most toothpaste.”
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