I was about to post "can't outrun a fork" too. Hour of running five days a week burns only enough calories two account for two super-sized Big Mac meals.
Not sure if it's true, but it's at least as scientific as "can't outrun your fork".
I haven't bothered to check if there's scientific literature that proves ingesting calories is easier than burning them, but I think you'd struggle to find a scientist or sane person who doesn't feel that generally it's orders of magnitude easier.