From what I understand about evolution (hint:  not much), the phrase "survival of the fittest" is a little misleading because it brings to mind a tough individual surviving in a difficult environment by being specially adapted.  But really, the organisms that survived weren't simply the ones that "fit" the best.  They were the ones who reproduced the most successfully.  Being "fit" in an environment can probably lead to reproducing, but that doesn't mean that the ones who reproduced were necessarily the most "fit".  They were just the best at reproducing. #science