If he had spent a childhood seeing and playing with his bicycle and riding off curbs of different sizes, he would have learned subtle, different cues that lets him distinguish between a 3-inch curb at one distance, a 6-inch curb a little further'
F or most of us, fat cells aren't created or destroyed. They just shrink or swell according to how much fat we're carrying. When glucose runs low, we tap fat cells for reserve energy.