This week's show explores echoes between mathematical truths and great existential questions. Krista Tippett talks with Janna Levin, a theoretical physicist with a special interest in the shape of the universe. She has written a novel that evokes the boundaries where science presses on great questions of meaning and purpose in human life. How do we know what is true? And are we really free to make our own decisions? [Broadcast Date: May 31, 2012]
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