London: Learning to cook may have helped the human brain to grow, leading to the development of tools, culture and civilisation, scientists claim. Scientists led by Suzana Herculano-Houzel, from the Federal University of Rio de Janeiro found the advent of cooking would have provided a much more efficient way of delivering calories to neurons, allowing the brain to expand, the Daily Mail reported.Without the invention of cooking humans would have to spend nine hours or more every day eating raw food only to support the 86bn neurons in their brains. Fewer hours spent foraging for food would also have freed up more time for social interaction and creative tasks. This probably contributed further to the evolution of a large and complex brain.The Brazilian scientists calculated the metabolic needs of both present-day great apes and a range of different early human species.
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