Scientists reported Tuesday that when they surveyed volunteers 14 months after they took a psychedelic drug as part of a research project, most said they were still feeling and behaving better because of the experience.

Two-thirds of them also said the drug had produced one of the five most spiritually significant experiences they'd ever had.

The drug, psilocybin, is found in so-called "magic mushrooms." It's illegal, but it has been used in religious ceremonies for centuries.