| UPDATED: 13:43, Wed, Mar 17, 2021 Link copied Sign up for FREE health tips to live a long and happy life SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they'll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. The richness of the human experience is that cultures and traditions are very specific to a time and place. While exploring how other people live is soul-enriching, it can also serve a scientific objective. Researchers have studied specific populations around the world to understand why some people are healthier than others.