thisamericanlife.org

rNdaM TIL: Unknown to Johnny Cash when he recorded it, "Ring of Fire" was written by June Carter about falling in love with him and her torment because she was married to someone else. She sang backup on Cash's version. Years later, when they were both divorced, they met again and eventually married.
E1ANp TIL that hog rectum and calamari have a taste and texture similar enough to be hard to tell apart
Lk4mQ TIL there is a researcher who can predict with 94% accuracy whether or not a married couple will break up within four years based on watching them have an hour-long conversation.