Two notable Closer To Truth contributors—and two good friends—discuss their intellectual and spiritual journeys in what seems to be opposite directions: one toward a form of Christianity and the other away from it.

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Cosmos and consciousness seem utterly different, the former encompassing the vast universe, the latter emerging from tiny brains. Yet consciousness founds most religions, and some cosmologists speak quietly, profoundly, about consciousness.

Featuring interviews with David Chalmers, Alexander Vilenkin, David Brin, Colin McGinn, and Paul Davies.

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Evolutionary biologist Nathan Lents argues that many of our supposedly modern ideas about gender and human sexuality are, in fact, deeply rooted in our animal ancestors. In this Chat, Lents discusses his new book, "The Sexual Evolution: How 500 Million Years of Sex, Gender, and Mating Shape Modern Relationships", a fascinating exploration of sexual behavior throughout the animal kingdom.

Nathan H. Lents is an American scientist, author, and university professor. He has been on the faculty of John Jay College since 2006 and is currently the director of the Cell and Molecular Biology program and the former head of the honors program and the campus Macaulay Honors College program.

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We like pushing boundaries, trying to discern existence, searching the foundations of reality, knowing all that can be known. Overly ambitious? Sophomoric? WeI don't care. We do it anyway. Here are ultimate questions.

Featuring interviews with Lawrence Krauss, John Leslie, Max Tegmark, and Paul Davies.

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What is quantum theory and why is it so strange? To know reality, one must confront the quantum. It is how our world works at the deepest level. What's the quantum? It is bizarre, defying all common sense.

Featuring interviews with Wojciech Zurek, Nima Arkani-Hamed, Lee Smolin, and Seth Lloyd.

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Robert Lawrence Kuhn sits down with philosopher Richard Swinburne to embark on a retrospective of his views and arguments over his illustrious career. In this episode, they'll explore the problem of evil, atonement, resurrection, and more.

Richard Granville Swinburne FBA is an English philosopher. He is an Emeritus Professor of Philosophy at the University of Oxford. Over the last 50 years, Swinburne has been a proponent of philosophical arguments for the existence of God.

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Closer To Truth host Robert Lawrence Kuhn recently published an extensive new article titled "A Landscape of Consciousness: Toward a taxonomy of explanations and implications". The paper covers the field of consciousness studies in its entirety as well as the consequences of consciousness including artificial intelligence (AI), life after death, and virtual immortality.

Read Kuhn's article on the Closer To Truth website.

Robert Lawrence Kuhn, PhD., is the co-creator, executive producer, writer, and host of Closer To Truth, the PBS/public television series on Cosmos, Life, Mind, and Meaning that presents leading scientists, philosophers, and creative thinkers discussing the fundamental questions of existence. He recently published an extensive article—"A Landscape of Consciousness: Toward a taxonomy of explanations and implications"—covering the field of consciousness studies in its entirety.

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If God exists, did God create everything? Did God create out of literally "nothing"? Suppose there was no beginning to the cosmos, just the universe going through endless cycles, what then? And what about "abstract objects" like logic and numbers, which seem to exist without any cause and no creator?

Featuring interviews with William Craig, Robert Russell, John Polkinghorne, and Brian Leftow.

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Time seems natural and absolute: the flow of moments one following another from the unknown past to the knife's edge present to the unknowable future. But this is not so. Einstein shocked the world by showing that time was "relative." What's the latest about time?

Featuring interviews with Gregory Benford, Kip Thorne, Nima Arkani-Hamed, and Lee Smolin.

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All who affirm that God does exist should examine the strong attacks of those who conclude that God does not exist, and then assess the sharp counterattacks of scholarly believers. Belief in God is too important to be determined by cultural circumstances.

Featuring interviews with Susan Blackmore, Peter Atkins, Alvin Plantinga, and Steven Weinberg.

You can watch the full episode on our YouTube channel here.