Eliezer Segal is a professor of religious studies at the University of Calgary. He has a Web page explaining the “Varieties of Orthodox Judaism.” The page sets out the many branches of the movement.

Norma Baumel Joseph is an associate professor of religion at Concordia University in Montreal. She writes about the experience of women in Orthodox Judaism.

David A. Harris is executive director of the American Jewish Committee, a nonpartisan organization that conducts an annual survey of American Jews.

Tamar Ross is a professor of Jewish philosophy at Bar-Ilan University in Ramat Gan, Israel. She writes about Orthodoxy and feminism.

Daniel Frank is director of the Judaic studies program at Purdue University in West Lafayette, Ind.

Richard Peace is a theology professor at Fuller Theological Seminary in Pasadena, Calif., and can discuss belief in miracles. He is the author of Contemplative Bible Reading: Experiencing God Through Scripture, which describes Lectio Divina from an evangelical perspective, and Spiritual Journaling: Recording Your Journey Toward God.

Daniel Stout is a professor of journalism and media studies at the University of Nevada, Las Vegas, and is co-editor of the Journal of Media and Religion. He can speak about miracles, including the Mormon perspective.

David K. Clark is vice president and dean at Bethel Seminary in St. Paul, Minn., and has written about miracles in world religions.

Richard Kieckhefer is chairman of the religion department at Northwestern University in Evanston, Ill., and can discuss the history of miracles, magic and sainthood.