Cognitive neuroscientist and author Daniel Levitin wrote a bestselling book, "Successful Aging," in which he gave plenty of tips on the best ways to grow old, including learning new things. Now, he is putting his own advice into practice - with a little help from his noteworthy friends. Special Correspondent Mike Cerre reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders