• According to the Big Bang theory, the Universe began about 13.7 billion years ago.
  • Everything in the Universe was part of that explosion, although not in its current form.
  • There is no way for scientists to know, since there is no remaining evidence.
  • The Big Bang hypothesis was not immediately accepted, but an important line of evidence was discovered in 1964.
  • The tiny bit of background radiation in the universe is energy remaining from the Big bang.
  • Use the resource below to answer the questions that follow.
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