Robin Hertz is a 75-year-old New York woman who was diagnosed with primary progressive multiple sclerosis (MS) at age 69. Within two years of diagnosis, she became a power wheelchair user. Gone was her ability to ski, or rock climb, or rappel into caves, but her spirit remains. Disability is just another challenge.

Robin is a retired epidemiologist. She did original health research for decades, publishing but also pitching her findings and expertise on television news programs and at professional meetings, groups as small as 20 and as large as 3,000. These days, she volunteers as a docent at a contemporary art museum in New York, taking groups of visitors around the museum, engaging in conversations about art, objects, and artistic processes. And in her spare time, she travels, having visited more than 100 countries, and adding a dozen new countries to her list since the onset of MS