It sounds really strange—a type of body fat that actually burns calories. But that’s exactly what so-called brown fat does. Babies and animals have it, but it’s long been thought that adults don’t. However a study coming out this week in the New England Journal of Medicine found that many adults do have this good fat. It’s the first hint of a possible new approach to treating obesity. Madelyn Fernstrom, the founder and director of the University of Pittsburgh Medical Center Weight Management Center, joins The Takeaway to talk about the significance of this finding.