What is the deepest nature of things? Our world is complex, filled with so much stuff. But down below, what's most fundamental, what is ultimate reality? Is there anything nonphysical? Anything spiritual? Or only the physical world? Many feel certain of their belief, on each side of controversial question.

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Max Tegmark is Professor of Physics at Massachusetts Institute of Technology. He holds a BS in Physics and a BA in Economics from the Royal Institute of Technology in Sweden. He also earned a MA and PhD in physics from University of California, Berkeley.

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Closer to Truth, hosted by Robert Lawrence Kuhn and directed by Peter Getzels, presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers.