Mark BarnesA longtime educator, author, and entrepreneur, avid reader and researcher, Mark became interested in-perhaps even a bit obsessive about-health, fitness, and longevity when he joined the After-50s club in 2014. He is the author of 10 books, including OLE Reversal (ASCD, 2013), Hacking Education (Times 10 Publications, 2015)--the first book in the internationally-renowned Hack Learning Series-and Hacking Life After 50 (Times 10 Publications, 2023)--the first book in the Hack Learning Life Series. Read More Read Less