This is the best summary I could come up with:

Early human hunter-gatherers ate mostly plants and vegetables, according to archeological findings that undermine the commonly held view that our ancestors lived on a high protein, meat-heavy diet.

The evidence, from the remains of 24 individuals from two burial sites in the Peruvian Andes dating to between 9,000 and 6,500 years ago, suggests that wild potatoes and other root vegetables may have been a dominant source of nutrition before the shift to an agricultural lifestyle.

“Conventional wisdom holds that early human economies focused on hunting – an idea that has led to a number of high-protein dietary fads such as the paleo diet,” said Dr Randy Haas, an archeologist at the University of Wyoming and senior author of the paper.

“Food is incredibly important and crucial for survival, especially in high-altitude environments like the Andes,” said Jennifer Chen, a PhD student in anthropology at Penn State University and first author of the paper, published in the journal PLOS One.

The researchers also found evidence of burnt plant remains from the sites and distinct patterns of dental-wear on the upper incisors of several individuals that indicate tubers, possibly wild potatoes, were the most prominent food source.

This view was partly driven by the archeological record, which is biased towards evidence of meat-eating because stone tools and butchered animal bones are much more likely to be preserved than plant remains.

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