Are bigger brains necessarily better brains? Sometimes, yes, but not always. It's the quality of the grey matter that counts and, of course, how you use it. For instance, Einstein had an average size brain, but had a humungous area of his parietal lobe, the part of the brain responsible for visual imagery and mathematical thinking. Women have smaller brains than men overall because we tend to be physically smaller. But that doesn't make us dumber, we just use our noodles differently, and, some say, make better use of a smaller space. Also, the additional surface area offered by deeper folds and convolutions on the brains surface can also give the average size brain more thinking power. {via Boing Boing, brain cupcake image courtesy of Me, Myself and Meningioma}