GRAMMY and Latin GRAMMY-winner, Carlos Vives, discusses his new documentary "EL MUNDO PERDIDO DE CUMBIANA (The Lost World of Cumbiana)" with moderator Felix Contreras from NPR Alt Latino. The documentary, directed by Carlos Felipe Montoya and produced by Isabel Cristina Vasquez from Mestiza Films, explores the history of the amphibian universe to understand why cumbia is the most authentic expression of the Colombian culture that has expanded internationally.