Burn: New Research Blows the Lid Off How We Really Burn Calories, Lose Weight, and Stay Healthy

by Herman Pontzer

Nine-year-olds burn 2,000 calories; for adults, it’s closer to 3,000, depending on how much you weigh and how much fat you carry (and for the record, the correct term when we’re talking about our daily energy needs is kilocalories, not calories).