For some us, numbers just make sense. So when I learned that inhabitants of Okinawa, Japan (one of the Blue Zones harboring a disproportionate share of centenarians with low levels of obesity and chronic diseases) apply a principle to eating known as Hara Hachi Bu, I became curious… In 2005, Dan Buettner created a concept explained in a National Geographic cover story that led to a decades-long research endeavor into the secrets of a long, healthy life. This led to the study