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Jo Vitale

Jo Vitale is dean of studies at the Zacharias Institute and an itinerant speaker for Ravi Zacharias International Ministries (RZIM). Prior to joining the US team, Jo was a speaker for RZIM Europe, where she also served in teaching and pastoral roles at the Oxford Centre for Christian Apologetics. During her years in Oxford, Jo completed an MSt (master of studies) in biblical interpretation and a PhD in Old Testament studies, both at the University of Oxford. Her doctoral dissertation was on the subject of women and beauty in the Old Testament.

Since joining RZIM, Jo has spoken internationally in a variety of contexts, including universities, churches, schools, conferences, and radio programs. She has also been involved in leading several weeklong outreach events at universities in the US and the UK. With her background in biblical studies, Jo has a particular passion for speaking on questions of biblical reliability, challenges to the character of God, and the uniqueness of Jesus Christ in a world of competing truth claims. Jo and her husband, Vince, are based at the Zacharias Institute in Alpharetta, Georgia.

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J.P. Moreland

J.P. Moreland is Distinguished Professor of philosophy at Talbot School of Theology, Biola University. He received a BS in physical chemistry from the University of Missouri, a ThM in theology from Dallas Theological Seminary, an MA in philosophy from the University of California at Riverside, and a PhD in philosophy at the University of Southern California. He has authored, edited, or contributed papers to 95 books, including Does God Exist? (Prometheus), Universals (McGill-Queen’s), Consciousness and the Existence of God (Routledge), The Blackwell Companion to Natural Theology, The Blackwell Companion to Substance Dualism, and Debating Christian Theism (Oxford.) He has also published close to 90 articles in journals such as Philosophy and Phenomenological Research, American Philosophical Quarterly, Australasian Journal of Philosophy, Meta Philosophy, Philosophia Christi, Religious Studies, and Faith and Philosophy. Moreland was selected in 2016 by The Best Schools as one of the 50 most influential living philosophers.

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Hugh Ross

Hugh Ross is an astronomer and founder and president of Reasons to Believe, an organization dedicated to demonstrating the compatibility of science and Christianity. Hugh earned a BS in physics from the University of British Columbia and an MS and PhD in astronomy from the University of Toronto.

For several years, he continued his research on quasars and galaxies as a postdoctoral fellow at the California Institute of Technology. While in college, he dedicated himself to faith in Christ following an in-depth study of Scripture that convinced him of the Bible’s factual accuracy.

Prompted by family, friends, and colleagues, Hugh founded Reasons to Believe in 1986, to bring scientific evidence for Christianity to light. Today, Hugh is the author of multiple books—including Improbable Planet, Navigating Genesis, and Why the Universe Is the Way It Is—and speaks on science-faith issues to audiences around the world.

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Tom Holladay

Tom Holladay is the senior teaching pastor at Saddleback Church in Lake Forest, California. Tom’s passion in ministry is to help people discover a love for the Bible and an understanding of God’s truth that changes the way they live. He also assists Rick Warren in teaching Purpose Driven Church conferences to Christian leaders all over the world. Books he has written include The Relationship Principles of Jesus, Love-Powered Parenting, and Foundations: 11 Core Truths to Build Your Life On. He also teaches DriveTime Devotions, a daily ten-minute podcast. He and his wife, Chaundel, have three children and six grandchildren.

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Michael Guillen

Dr. Michael Guillen was born in East Los Angeles, earned his BS from UCLA, and the equivalent of three PhDs from Cornell University in physics, mathematics, and astronomy. For eight years he was an award-winning physics instructor at Harvard University. A three-time Emmy Award winner, he served as the science correspondent for ABC News for fourteen years, appearing regularly on Good Morning America, 20/20, Nightline, and World News Tonight.

Dr. Guillen is the host of the History Channel series Where Did It Come From?, a best-selling author, a columnist for Fox News and U.S. News and World Report, and producer of the award-winning family film Little Red Wagon. His books include Bridges to Infinity: The Human Side of Mathematics, Can a Smart Person Believe in God?, Amazing Truths: How Science and the Bible Agree, and his latest, a thriller novel, The Null Prophecy.

Dr. Guillen is the chairman and president of the Philanthropy Project, Spectacular Science Productions Inc., and Filmanthropy Media. He lives in Nashville with his wife, Laurel, their son, and a growing number of barnyard animals. You can keep up with his many adventures on www.michaelguillen.com and on Facebook, under Michael Guillen PhD.

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Fazale Rana

Biochemist Fazale “Fuz” Rana is vice president of research and apologetics at Reasons to Believe. Fuz earned a BS in chemistry at West Virginia State University and a PhD in chemistry with an emphasis in biochemistry at Ohio University. He pursued postdoctoral studies in the biophysics of cell membranes at the Universities of Virginia and Georgia, has coauthored numerous papers for peer-reviewed journals, and holds two patents. Fuz converted to Christianity during graduate school. Though he initially embraced the evolutionary paradigm, Fuz eventually drew the conclusion that only a Creator’s involvement could explain the elegance of biochemical systems. Today, Fuz writes and speaks extensively about evidence for creation emerging from biochemistry, genetics, human origins, and synthetic biology. He is the author of multiple books, including Dinousaur Blood and the Age of the Earth and The Cell’s Design.

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Paul Copan

Paul Copan (PhD, Marquette University) is the Pledger Family Chair of Philosophy and Ethics at Palm Beach Atlantic University. For six years, he served as president of the Evangelical Philosophical Society. He is author and editor of over thirty books, including works such as True for You, but Not for Me, When God Goes to Starbucks, Is God a Moral Monster?, Did God Really Command Genocide?, A Little Book for New Philosophers, and Dictionary of Christianity and Science. He has also contributed essays to over thirty books, both scholarly and popular, and authored a number of articles in professional journals. He has been a visiting scholar at Oxford University. Paul and his wife, Jacqueline, have six children, and they reside in West Palm Beach, Florida.

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Caleb Kaltenbach

Caleb Kaltenbach is a pastor and author of God of Tomorrow: How to Overcome the Fears of Today and Renew Your Hope for the Future (releasing May 2018). His first book was Messy Grace: How a Pastor With Gay Parents Learned to Love Others without Sacrificing Conviction. In Messy Grace, Caleb discusses his experience of being raised in the LGBT community, trusting Christ, and helping others to understand that loving others doesn’t require a shift in our biblical beliefs. He’s a graduate of Ozark Christian College, Talbot School of Theology (Biola Univeristy), and received his doctorate from Dallas Theological Seminary. Besides speaking at conferences and churches, Caleb has also contributed to or been a guest on the New York Times, Fox and Friends, The Glenn Beck Show, The Eric Metaxas Show, Christianity Today, Focus on the Family, FamilyLife Today, Carey Nieuwhof Leadership Podcast, Church Leaders Podcast, The 700 Club, Moody Radio Show, Q Podcast, Dallas Seminary Podcast, and more. Caleb and his wife, Amy, reside in Southern California with their two children.

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Jeff Zweerink

Astrophysicist Jeff Zweerink is a senior research scholar and the executive director of online learning at Reasons to Believe (RTB). He earned a BS in physics and a PhD in astrophysics from Iowa State University, with a focus on gamma rays. Jeff was also involved in research projects such as the Solar Two Project and the Whipple Collaboration and is coauthor of over 30 academic papers.

Having once struggled with reconciling his love of science with his Christian faith, Jeff’s involvement in apologetics grows from his desire to help others bridge the perceived science-faith gap. Today, Jeff writes and speaks on the compatibility of faith and science and on evidence for a Creator from exoplanet research and the multiverse theory. He authored Is There Life Out There? and coauthored RTB’s Impact Events study guide series for students. Jeff also works on GAPS, a balloon experiment seeking to detect dark matter, at UCLA.

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Cameron McAllister

Cameron McAllister is an itinerant speaker at Ravi Zacharias International Ministries (RZIM). He earned a degree in philosophy and religion from Toccoa Falls College and is currently finishing up a master’s in cultural apologetics from Houston Baptist University. He is the host of Vital Signs, a weekly podcast exploring signs of life in today’s culture. Cameron is also a staff writer with Christ and Pop Culture, where he explores the intersection of Christianity and popular culture. His film and television reviews have also appeared in Christianity Today.

Cameron was born on the mission field in Vienna, Austria. He moved to the United States with his family in 1998 when his father, Stuart McAllister, began working with RZIM. Cameron and his wife, Heather, currently reside in Georgia.

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