Doing what you love keeps you young. For the woman in the video below, is saving lives. She has been doing so for the last six decades working as a nurse, and she is still going strong. SeeSee Rigney is the oldest working nurse in the world and has recently celebrated her 90th birthday with her co-workers at the Tacoma General Hospital in Tacoma, WA. She is such a great inspiration to us all and proves once again that age is nothing but a number. What matters more than your age is your determination and your desire to help others in need.