In this episode, the Institute for Theological Encounter with Science and Technology hosts a conference on Our Lady of Guadalupe at the Cardinal Rigali Center in St. Louis, MO. Father D. Bruce Nieli, C.S.P., a Paulist evangelist and missionary born and raised on Long Island, and Dr. David Keys, a PhD in physics from Washington University in St. Louis, MO, discuss the faith and the science behind the tilma of Our Lady of Guadalupe. November 18, 2018.