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Most researchers think that humans in the Middle Stone Age — which began around 300,000 years ago and ended around 50,000 years ago — depended on foodstuffs such as underground tubers and meat.
After examining 70 stone tools, including scrapers and grinders, he found that 80% contained traces of starch granules, mainly from wild Other scientists, however, are sceptical.
Archaeologist Lyn Wadley, an honorary professor at the University of the Witwatersrand in Johannesburg, South Africa, points out that starch grains are notoriously difficult to identify, varying not only among species but also between different parts of a plant.
Note: The distance to frontier (DTF) measure shows the distance of each economy to the “frontier,” which represents the best performance observed on each of the indicators across all economies in the sample since 2005.
An economy’s distance to frontier is reflected on a scale from 0 to 100, where 0 represents the lowest performance and 100 represents the frontier.
In 2007, the team made this trip every day as they excavated in a dark chamber 20 metres from the cave entrance, identifying animal bones along with more than 500 quartz artefacts.