Mike Sheldon as he might appear at age 72 after decades of smoking.

Non-smoking Mike Sheldon as he appears today at age 30.

Today is the Great American Smokeout across the nation, and smokers and nonsmokers alike have a chance

to see how the deadly habit can change their appearance.

Those visiting the exhibit, open from 1:30 to 5 p.m., also can see how their own faces would become wrinkled and discolored if they smoked for years. Age-progression software demonstrations will show the effects of smoking compared to the natural aging process.