As does my mother, who has little in the way of gray hair, still drives, and is full of energy and mentally sharp — at 91.
My uncle passed at 99. Up until around 95 or 96, he was sharp as a tack. I loved talking to him about his boyhood in Danzig, Germany during the Weimar Republic. He ran a uranium separation plant in Tennessee in WW II and went on to develop nuclear weapons before he had enough of the killing machines. He then went back to school, got his MD and DDS and had a successful orthodontia career. He skied Mt. Baldy in Sun Valley, ID every day the resort was open until he was 86 and put away the sticks. He was a great guy and we sure miss him.