With one in every seven Americans now over the age of 65, it’s no wonder adult development and aging is a rapidly expanding field of study. What’s normal aging? What’s not? And what control do we have over our own aging process? Dr. Marty Sliwinski directs Penn State’s Center for Healthy Aging, one of many such centers around the country, where he’s involved in ground-breaking training, research and outreach aimed at identifying the underlying pathways to healthy and unhealthy aging.