Does muscle burn more calories than fat?

This question sounds like a weight-loss myth, but it is, in fact, true. Muscle is designed for movement, so it burns energy at a higher rate than fat, which is used to store or conserve energy.  John M. Kennedy, MD, director of preventative cardiology and wellness at Marina Del Rey Hospital in California and author of The Heart Health Bible, notes that a pound of muscle burns about 7 to 10 calories a day when at rest, compared with 2 or 3 calories for fat.

Source: Everyday Health