This year the radio in Puerto Rico celebrates its centenary.  To honor the occasion, Dr. Mario Roche Morales discuss with us about his research and shares important elements that he later published in the book, Un país que se escucha: apuntes sobre la historia de la radio en Puerto Rico (A country that is been heard: notes of the history of the radio in Puerto Rico). Connect with Roche here-->> roche.mario@gmail.com.