As a neuroscientist, professor emeritus of psychology, musician and best-selling author, Daniel Levitin has extensively studied the brain and its impact on aging. His latest book, "Successful Aging," explores the questions: what happens in the brain as we age and what are the keys to aging well? NewsHour Weekend's Christopher Booker recently spoke to Levitin to learn more. Stream your PBS favorites with the PBS app: to.pbs.org/2Jb8twG Find more from PBS NewsHour at www.pbs.org/newshour Subscribe to our YouTube channel: bit.ly/2HfsCD6 Follow us: Facebook: www.pbs.org/newshour Twitter: www.twitter.com/newshour Instagram: www.instagram.com/newshour Snapchat: @pbsnews Subscribe: PBS NewsHour podcasts: www.pbs.org/newshour/podcasts Newsletters: www.pbs.org/newshour/subscribe