Humans express feelings, and as such, these emotions become the fine lines seen with aging. Squinting leads to crow's feet (lines radiating from the corners of the eyes), frowning causes frown lines (furrows between the eyebrows), and laughing leads to laugh lines (arc-shapes around the mouth).  Wrinkles are a result of age-related weakening of the skin's collagen and elastin, the fibers that keep the skin firm in youth.  To prevent and minimize fine lines and wrinkles, wear sunblock with an SPF 15 or greater, whenever you venture outdoors for more than 15 minutes.  Skin moisturizers containing pregnenolone, a hormone, may help to hydrate the skin and improve visible wrinkles.  In 2005, Canadian researchers proved that beta glucan, the soluble fiber found in the cell walls of oat kernels and an ingredient in some skincare products, can penetrate the skin and reduce the appearance of wrinkles. 

"If wrinkles must be written upon our brows, let them not be written upon the heart.  The spirit should not grow old." ~ James Garfield