This brain scan of a 44-year-old French civil servant, published in the journal Lancet, reveals his brain to be much smaller than normal. The dark area on the scan shows the swollen, fluid-filled space that has crowded his skull, leaving little room for his brain. Oddly, the man's cognitive abilities did not seem to be profoundly affected by his unusually small brain, as he was deemed to possess only moderately below-normal intelligence. (Handout)