Turns out that intelligent people are generally healthier than their less-clever peers - studies have shown that brainiacs are, for instance, less likely to suffer from heart disease and Alzheimer's. Scientists have suggested that smart people may score less stressful jobs in safer places and that they may make better lifestyle choices, for instance by exercising more and eating better. In other words, maybe bright people actually listen to the Surgeon General.

But these newest findings, to be published...