...The results published in PNAS (Proceedings of the National Academy of Sciences) also suggest tooth decay was more prevalent in earlier societies than previously estimated. The results also suggest that the hunter-gatherer society studied may have developed a more sedentary lifestyle than previously thought, relying on nut harvesting. Dental disease was thought to have originated with the introduction of farming and changes in food processing around 10,000 years ago. A greater reliance on cultivated plant foods, rich in fermentable carbohydrates, resulted in rotting teeth.High level of decayNow, the analysis of 52 adult dentitions from hunter-gatherer skeletons found in a cave...