Sonia Turanski of Penobscot is leading a new study group on world religions. It meets at 10:30 a.m. Wednesdays at Castine Unitarian Church on the town common. A third-year student at Bangor Theological Seminary, Turanski is pursuing a master of divinity degree with a concentration in comparative religion and interfaith dialogue. For information or to register, call 326-9977. The next session will be at the church Wednesday.