These tools give archaeologists a good idea of how our ancestors might have procured their food. They would now have been able to dig up termite colonies or scavenge big game carcasses in the savannah, cutting through bones into the nutritious marrow. The extra calories available to them would have fueled the development of their larger brains, which demanded more metabolic energy. Their larger brains, in turn, gave them the social intelligence to thrive in their newly complex societies, creating a positive feedback cycle, leading to the evolution of even more powerful brains capable of
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Tool to better food to better nutrition to better brain to better social complexity to better tool
