When Marge Jetton turned 100, she didn’t slow down—she renewed her driver’s license for another five years. What keeps her going, she says, is not just good habits, but her Christian faith. Marge lives in Loma Linda, California, a community long studied by scientists and first brought to global attention by Dan Buettner in National Geographic as part of the Blue Zones research. People there—many of them from the Seventh-day Adventist Church—tend to live 4–10 years longer than