“Just as not requiring a child to reason critically will stunt her intellect, not stressing a child's bones, muscles and immune systems will fail to match these organ's capacities to their demands.” EvolutionAnthropologyHomo SapiensEvolutionary BiologyErgonomicsAllergiesies Book:The Story of the Human Body: Evolution, Health, and Disease Source: The Story of the Human Body: Evolution, Health, and Disease