Published: November 2005
Learn More
In Learn More the National Geographic magazine team shares some of its best sources and other information to expand your knowledge of our featured subjects. Special thanks to the Research Division.

Related Links

Centers for Disease Control and Prevention
Explore the nutritional guidelines for maintaining a healthy lifestyle.

Okinawa Centenarian Study
Follow the examples of the amazing centenarians of Okinawa, Japan—you could live longer.

Harvard School for Public Health
Learn about health food recommendations from Harvard experts.

World Health Organization
The World Health Report 2004 lists the countries whose residents live the longest, healthiest lives.

Seventh-day Adventists
Explore the beliefs of some of America's longevity all-stars.


Fraser, Gary. Diet, Life Expectancy, and Chronic Disease: Studies of Seventh-day Adventists and Other Vegetarians. Oxford University Press, 2003.

Parker-Pope, Tara. "What Science Tells Us About Growing Older, and Staying Healthy." Wall Street Journal. June 20, 2005.

Poulain, Michel, and others. "Identification of a Geographic Area Characterized by Extreme Longevity in the Sardinia Island, the AKEA study." Experimental Gerontolog (2004) 1423-9.

Willcox, Bradley, D. Craig Willcox, and Makoto Suzuki. The Okinawa Program: How the World's Longest-Lived People Achieve Everlasting Health—and How You Can Too. Clarkson Potter Publishers, 2001.

NGS Resources

Weiss, Rick. "Aging—New Answers to Old Questions." National Geographic (November 1997), 2-31.

Leaf, Alexander. "Every Day Is a Gift When You Are Over 100." National Geographic (January 1973), 92-119.

Bell, Alexander Graham. "Who Shall Inherit Long Life? On the Existence of a Natural Process at Work Among Human Beings Tending to Improve the Vigor and Vitality of Succeeding National Geographic (June 1919), 504-14.