It's NOT a trivial problem, though. There's evidence that other mammal species are also experiencing obesity epidemics, even though their diets haven't changed:

It's NOT a trivial problem, though. There's evidence that other mammal species are also experiencing obesity epidemics, even though their diets haven't changed: http://www.aeonmagazine.com/being-human/david-berreby-obesity-era/ http://www.aeonmagazine.com/being-human/david-berreby-obesit...