MAPLE LAKE, Minn. - The ancient Roman Catholic ritual in which someone continuously adores the Eucharist, the wafter at the heart of the Catholic Mass, is making a comeback in St. Timothy's Catholic Church here, and nearly 40 other churches in the state. "It's a bottom-up phenomenon," said John Boyle, a professor of theology and Catholic studies at the University of St. Thomas in St. Paul. "It's been remarkable over the past 20 years to watch it grow, especially the past 10 years." The practice is known as "perpetual adoration" and was once the purview of nuns and monks, but...