Our happy hour fact to amaze your drinking buddies with.

Young male adults who smoke a pack a day have an average IQ score that is 7.5 points lower than their nonsmoking peers.

Israeli researchers correlated the IQs of 20,000 men between ages of 18 and 21 with their smoking habits. The results were crystal clear: The more cigarettes a person smoked in a day, the lower his IQ score. Perhaps most importantly, this was still true among brothers -- who would have grown up in roughly the same environmental conditions.

Although there have been some studies suggesting smoking might lower a person's IQ, the researchers on this project seem to be leaning toward the conclusion that folks with lower IQs generally make poor health decisions.

Also, now that your cell phone can make you look occupied when you have no one to talk to at a social event, it is that much harder for an intelligent person to justify smoking.