Evidence for Inflation: What is the observational evidence the universe underwent a brief but very rapid period of inflation at the end of the GUT era, early in the history of the Universe. Does any of this evidence count as direct observational evidence? Does the validity of the Big Bang depend on inflation being correct?

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The Answer of Evidence for Inflation: What is the observational evidence the universe underwent a brief but very rapid period of inflation at the end of the GUT era, early in the history of the Universe. Does any of this evidence count as direct observational evidence? Does the validity of the Big Bang depend on inflation being correct?

Evidence for Inflation: What Is the Observational Evidence the Universe