Research shows morning people tend to live longer than night owls. But it may less to do with sleep and more to do with what happens when you're awake. Finnish researchers analyzed data from more than 20-thousand people who took a survey in 1981 about their sleep habits, according to the study published last week in the peer-reviewed journal Chronobiology International. They discovered mortality risk in night owls was not because of lack of sleep but mainly tied to smoking and alcohol. Deaths from alcohol-related diseases and poisonings were seen more often in the evening type group. The study doesn't explain why night owls were more likely to drink and smoke. But Jennifer Martin, professor of medicine at UCLA and former president of the American Academy of Sleep Medicine, who was not involved in the study, suggests it may have something to do with what establishments are typically open late at night.