This 103-year-old woman celebrating her birthday in a Wonder Woman costume is amazing enough as it is, but she deserves that title for more than her outfit. Mary Cotter spends most of her time putting others before herself, and even at 103, she drives to a senior center in Montclair, CA, every single day to volunteer. Before that, she taught swimming to children when she was in her 60s, and she helped rescue sea turtles well into her 90s! Her secret to a long life? "Just keep busy, I guess," she said in the video by ABC News [1].

Mary is an inspiration to so many. "Don't let anyone tell you that with age, you have to lose anything," said one of Mary's peers, who views her as a role model. So inspiring!