In a little-known mountainous area called Hunza Valley, located far north of Pakistan, people seem to defy all medical odds. It is primarily home to the Burusho and Wakhi people, who for centuries have survived and thrived in remote villages — with minimal amenities and rudimentary health facilities. Studies have found that the average life expectancy here is around 100 years. My husband was born and raised here, and is from the Burusho indigenous community. After we got married, I left the U.S. and we settled down in the Central part of the valley. Here are some intriguing habits that...