Few stories are tied so closely with childhood as the fairy tales of the Brothers Grimm. But as the scholar Maria Tatar notes, Jacob and Wilhelm Grimm didn’t initially intend for children to read the more than 200 German folk tales they collected and rewrote. Two centuries later, they’re still being rewritten. Tatar says fairy tales are continually adapted to embody the cultural values of their time and place, and each retelling captures the values of the teller. She joins us Tuesday to explore the evolving world of the Brothers Grimm.