Alan Guth is the man who put the bang in the Big Bang, when late one night he came up with the astonishing idea – astonishing even to him – that the universe grew from a fraction of an ounce into the entire cosmos in an incomprehensibly brief moment of time. His insight that night, the theory that became known as inflation, is now the foundation for ideas about the cosmos that are as astonishing as inflation itself, including the idea that an infinite number new universes are being created all the time.

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