that's like asking "why is warren buffet rich?" answer: because his money in was greater than his money out. doesn't really explain much, does it? specifical

that's like asking "why is warren buffet rich?" answer: because his money in was greater than his money out. doesn't really explain much, does it? specifically, calories in/out doesn't explain: satiety, insulin resistance, muscle anabolism/catabolism, or cravings. there's much more to it then in/out. yes, thermodynamics applies. no, humans are a bit more complicated than a terrarium.