Everyone knows that smoking leads to health and mortality problems and premature aging. Now there is photographic evidence that it harms your looks. A study out of Case Medical Center in Cleveland showed that in identical twins, those who smoked for a greater number of years had more wrinkles, crows-feet, and other signs of aging. So if you smoke, the sooner you quit, the fewer signs of aging you will show.

Here is the link to the New York Times story about the study and to a quiz you can take showing some of the identical twins.