USNews.com: Health: In Brief: Seniors' Health: Longevity (12/31/04): "It must be the chocolate...or the cheese...or the Alpine air...or the fierce independence. People in Switzerland are more likely to make it to 100 than people in any other European country. Researchers in France and in Lausanne, on the shores of Lake Geneva, looked at patterns of age in Switzerland." Definitely, HAS to be the chocolate.