21.   In some adult animals, brown fat can apparently burn the calories from eating too much.

22.   It not only burns calories, but also heightens feelings of well-being, works off tension and improves self-esteem.

23.   It must not burn many calories to engage in aerobic alibiing.

24.   Many diets fail because the dieters, by starving themselves, cause their metabolisms to slow down, burning fewer calories.

25.   Minute for minute, jumping rope burns more calories than almost any other activity, besides fast running.

26.   More steps, more muscle contractions, higher oxygen consumption, more calories burned.

27.   More important in recent years is that the cost of burning those calories has surged as work has become more sedentary.

28.   Older people need food with more nutrients and fewer calories, in part because they tend to burn fewer calories.

29.   Proteins that slash appetites, molecular receptors that signal fullness to the brain, fat-burning hormones, flawed genes that regulate how fast calories are burned.

30.   Presumably burning fewer calories reduces free radicals and extends life span.