For more than a decade, author Dan Buettner has been working to identify hot spots of longevity around the world. With the help of the National Geographic Society, Buettner set out to locate places that not only had high concentrations of individuals over 100 years old, but also clusters of people who had grown old without health problems like heart disease, obesity, cancer, or diabetes. His findings—along with easy steps you can take to live more like these cultures—can be found in his book, The Blue Zones Solution.