Terry Gross

Father Joseph Fessio. He is Provost of Ave Marie University and Editor-in-Chief of Ignatius Press. He is a longtime personal friend and former student of the Cardinal Ratzinger, now Pope Benedict.

A gay priest (who will go unnamed). His superiors have asked him not to give his name, though he has been given permission to speak about his work. He is in active ministry and works in a parish. In a few weeks the Vatican is expected to issue a ruling banning gay men from entering the seminary.

Historian Edward Larson has written extensively on the intersection of science, politics and religion. In 2004, Larson's Evolution: The Remarkable History of A Scientific Theory traced the contentious path the theory of evolution has followed.