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Question on Matter/Anti-matter

  1. Nov 17, 2007 #1
    I've read how in the early early universe, there were massive amounts of collisions between matter and anti-matter, about a billion of each annihilated to every atom left over.
    My question is, what happened to all that energy?
  2. jcsd
  3. Nov 17, 2007 #2


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    Science Advisor

    Without going into a lot of detail, it is the cosmic microwave background.
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