"Common sense has led more than one person astray. Sir Francis Galton thought there was an obvious, common sense link between a person's intelligence and his or her head size. We know today that there is absolutely no truth to this theory. It also makes you wonder about Sir Francis, whose head was reportedly so small he could have been nicknamed 'pinhead.'"
[Galton pioneered the use of fingerprints for human identification. Not all of his work, however, was equally useful: Galton also tried to use statistical methods to work out the distribution of attractive people in England and to determine what percentage of prayers were answered.]