Public Health Scene

Author Dan Buettner has scoured the Earth—not for the fabled Fountain of Youth—but for the key to a happy old age. In his book, “The Blue Zones: Lessons for Living Longer from the People Who've Lived the Longest,” Buetnner interviews several experts on aging, including the University of Minnesota's Robert Kane (pictured).

In an excerpt from the book, Kane offers advice for adding good years: "Rather than exercising for the sake of exercising, try to make changes to your lifestyle. Ride a bicycle instead of driving. Walk to the store instead of driving. Use the stairs instead of the elevator. ..."

Read more from the excerpt of Buetnner's book at National Public Radio