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PBS: How Cosmic Inflation Flattened the Universe | Space Time

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Although much of the Big Bang Theory is widely accepted to be true, it only gets us part of the way there. Observable truths such as the CMB and the flatness of our universe reveal that there is no way the universe has been expanding at a constant rate since its beginning. It turns out Cosmic Inflation solves the Big Bang’s major problems quite well. So well in fact, that we might not even need a Big Bang at all!