You're in your 30s or 40s and are too busy with life itself to give much thought to what it will be like to experience life as a senior. And then, the next thing you know, you're there, your mind struggling to recognize the face staring back at you in the mirror. It happens to us all and in service to the inevitable, we begin a new series about “Healthy Aging” co-hosted by Bill Goodman and primary care physician Dr. Jeff Foxx. Their guest is Dana Smith, who writes about aging issues for the New York Times.