63879901 story Why Do Humans Grow Up So Slowly? Blame the Brain 128 Posted by Unknown Lamer on Monday August 25, 2014 @10:03PM from the brains-considered-harmful dept. sciencehabit (1205606) writes Humans are late bloomers when compared with other primates — they spend almost twice as long in childhood and adolescence as chimps, gibbons, or macaques do. But why? One widely accepted but hard-to-test theory is that children's brains consume so much energy that they divert glucose from the rest of the body, slowing growth. Now, a clever study of glucose uptake and body growth in children confirms this 'expensive tissue' hypothesis.