By Ian M. Giatti, CP Contributor Yale Divinity School, located in New Haven, Connecticut | Courtesy Yale Divinity SchoolTwo centuries after its founding, Yale Divinity School marked its first-ever non-Christian service in honor of Earth Day.Around 80 students gathered on April 22 outside the university’s Marquand Chapel to mark the annual observance with singing and non-denominational prayers, according to The Yale Daily News.A student organizer told the independent student newspaper it was the first time a non-Christian service was held at the Yale Divinity School in its nearly 200-year history.