#tooth-enamel

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fromHarvard Gazette
19 hours ago

Research finds 18-million-year-old enamel proteins in mammal fossils - Harvard Gazette

"Teeth are rocks in our mouths. They're the hardest structures that any animals make, so you can find a tooth that is a hundred or a hundred million years old, and it will contain a geochemical record of the life of the animal."
Science
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