Researchers have discovered ancient dental fillings in northern Italy, the world’s oldest. The fillings were found inside a pair of 13,000-year-old front teeth. They were made of bitumen, a semi-solid form of petroleum.
Each of the two teeth feature large cavities. Marking on the walls of the holes suggest the cavities were hollowed out and enlarged by stone tools. While analyzing the holes, scientists found residues of bitumen. Researchers also found plant fibers and hair trapped in the asphalt.
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