Blame it all on brown fat now.
D000273:Adipose Tissue / Q000378:metabolism*; D002001:Adipose Tissue, Brown / Q000378:metabolism*; D000367:Age Factors; D000818:Animals; D001831:Body Temperature; D001835:Body Weight; D004032:Diet; D002149:Energy Intake; D004734:Energy Metabolism; D006801:Humans; D009765:Obesity / Q000378:metabolism*; D051381:Rats