John Green, of Mental Floss, returns with 33 quirky facts about colleges for all you trivia junkies. Among the most interesting facts: Did you know that Ohio University is considered the most haunted university? Green says, “There’s even a closed dorm room–No. 428 in Wilson Hall–because it’s allegedly haunted by a girl who practiced witchcraft and died there.” Check out the other 32 fun facts about our colleges and unviersities.