This use of polished stone axes elevated tremendously within the Neolithic, but were originally used in the preceding Mesolithic in some areas corresponding to Ireland. Agriculture fed bigger populations, and the transition to sedentism allowed simultaneously raising extra youngsters, as infants no longer wanted to be carried, as nomadic ones should. Additionally, kids might contribute labor to the raising of crops extra readily than they might to the hunter-gatherer economic system. The discovery and use of fireplace, a easy energy source with many profound uses, was a turning point in the technological evolution of humankind. Fire, fueled with wood and charcoal, allowed early humans to cook their food to increase its digestibility, enhancing its nutrient worth and broadening the variety of foods that might be eaten.

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