WASHINGTON (Reuters) - "Magic mushrooms," used by Native Americans and hippies to alter consciousness, appear to have similar mystical effects on many people, U.S. researchers reported on Tuesday. At least one team of doctors is already testing whether using them can help terminal cancer patients come to terms with their fates. More than 60 percent of volunteers given capsules of psilocybin derived from mushrooms said they had a "full mystical experience." "Many of the volunteers in our study reported, in one way or another, a direct, personal experience of the 'beyond,'" said Roland Griffiths, a professor of neuroscience and psychiatry...