This week on “The Learning Curve," co-hosts Gerard Robinson and Cara Candal talk with Nicholas Basbanes, author of the 2020 literary biography, Cross of Snow: A Life of Henry Wadsworth Longfellow. He shares why poetry - from the Epic of Gilgamesh and Homer to Dante, Shakespeare, Longfellow, Emily Dickinson, and Langston Hughes - may well be the most influential, enduring form of written human expression.