Relatively healthy seniors who pray or meditate may add years to their lives, says a study out today. The devout have long believed that prayer helps gain admission to the hereafter. But the study suggests that regular prayer, Bible study or meditation may have important benefits in the here and now. "This is one of the first studies showing that people who pray live longer," says Harold Koenig, one of the researchers at Duke University Medical Center in Durham, N.C. Koenig and colleagues describe the study in the Journal of Gerontology.