In the 1600s, people in Osaka ate dozens of species of fish, mammals and plants; 400 years later scientists found the evidence trapped in their teeth

• Image: AI GFour centuries ago, the people living in Osaka left behind an unlikely record of what they ate.
• It was not written in a cookbook or preserved in a market ledger, but in the hardened deposits that accumulated on their teeth.
• Scientists have now analysed ancient dental calculus from eight people buried at the Ofuka-cho site, also known as the Umeda cemetery, in Osaka.