Everyone knows that smoking can cause lung cancer. But there are many other less known ill effects being investigated, adding to the list of reasons to ditch the habit.

Many Americans may enjoy drinking on New Year's Eve, but they don't top the charts. In fact, the US is not even among the 25 "drunkest" countries in world alcohol consumption rates.

Excessive drinking has been linked to chronic pancreatitis, but only a fraction of alcoholics get the disease. A gene mutation can identify men who are at highest risk.