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Ancient teeth pose a mystery: What made those strange grooves?
NEWS DESKBreaking News
PUBLISHEDSep 19, 2026, 11:21 AM
What the source reports
New research on ancient human remains suggests the habitual usage of betel nuts, a plant seed with mind-affecting properties that is popular in parts of Asia despite the health risks it presents. (Image credit: Claire Harbage/NPR)
Main source: NPR
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