I was an empty nester who got laid off and felt alone. I started housesitting, and my whole outlook on aging changed.

tk Courtesy of Amber Campbell. After I turned 50 and my kids launched, I thought my best years were behind me. Learning about superagers changed how I think about aging and what's possible. I gave up my apartment, started traveling full time, and realized I was just getting started. One day, after my youngest daughter left home, I found myself walking around my favorite Seattle park feeling so lonely, invisible, and unmoored that I thought I might just disappear without anyone noticing. Aft...