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For decades, scientists have tried to test the power of prayer and positive thinking, with mixed results. Now some scientists are fording new -- and controversial -- territory. Gail Ironson an AIDS researcher from the University of Miami noticed that a number of patients with HIV inexplicably never got sick. In trying to understand why, she discovered something surprising. "If you ask people what's kept you going so long, what keeps you healthy, often people would say spirituality," she says. "It was something that just kept coming up in the interviews, and that's why I decided to look at it." Ironson began to zero in on a patient's relationship with God in an attempt to predict how fast the disease would progress. This NPR article shares more about her intriguing research and findings.