His findings—along with easy steps you can take to live more like these cultures—can be found in his book, The Blue Zones Secrets for Living Longer: Lessons From the Healthiest Places on Earth.

You'll earn 6% back at U.S. supermarkets on up to $6,000 a year in spending, plus 6% back on select U.S. streaming services and 3% back at U.S. gas stations and eligible transit. Terms apply. The ...