Hunza is at the very high altitude in the Himalayan Mountains of Asia. There, many people over 100 years of age are still in good physical health. Additionally, men of 90 are new fathers, and women of 50 still have babies. What are the reasons for this good health? Scientists believe that the people of Hunza have these three main advantages or benefits: (1) a healthful unpolluted environment with clean air and water; (2) a simple diet high in vitamins fiber, and nutrition but low in fat, cholesterol, sugar, and unnatural chemicals; and (3) physical work and other activities, usually in the fields or with animals.