Cosmologist and physics professor Will Kinney discusses his book, An Infinity of Worlds: Cosmic Inflation and the Beginning of the Universe. Kinney considers what happened before the primordial fire of the Big Bang. What is the origin of structure in the cosmos? Can we come to terms with the possibility that our entire observable universe is one of infinitely many, forever hidden from our view? Kinney's book is available for purchase now. Will Kinney is a professor in the department of physics at the University at Buffalo, the State University of New York. His areas of expertise are cosmology, dark matter, astronomy, black holes, and gravitational waves.