Dr. David Keys received a Ph.D. in Physics from Washington University in St. Louis, MO in 1984 and a Masters in Theology from Franciscan University in Steubenville, Ohio in 2013. For 38 years he worked in the field of Medical Physics, being involved in the physics of radiation treatment of cancer patients and in the physics of diagnostic imaging of patients and was named a Fellow by the American College of Radiology, the American Association of Physicists in Medicine, and the American College of Medical Physics. Dr. Keys retired from Medical Physics in 2012, and has since then, published a book—Exploring the Belief in the Real Presence, has been on EWTN, Immaculate Heart Radio, and Covenant radio networks and has delivered numerous talks on a variety of topics, including Faith and Science, the Shroud of Turin, and the Tilma of St. Juan Diego. In June, 2021, Dr. Keys was named Catholic Man of the Year in the St Louis Archdiocese by Lu Cortese’s St Joe Radio/SJENT.