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What teeth enamel tells us about ancient human diets

NPR | By Nathan Rott
Published June 5, 2026 at 3:19 PM CDT

The enamel on our teeth is the hardest tissue on the human body. A new study looks at the nanoscale structure of enamel from teeth dating as far back as 18 million years ago to see how it's changed.

Copyright 2026 NPR
Nathan Rott
Nathan Rott is a correspondent on NPR's National Desk, where he focuses on environment issues and the American West.
See stories by Nathan Rott
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