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Why did Dark Matter have less of an Impact on the Universe

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  1. Feb 11, 2015 #1
    Why did Dark Matter have less of an Impact on the Universe than Dark Energy? Under a different set of universal laws, do you think it would be possible for Dark Matter to have more of an impact than Dark Energy during an alternate big bang to create a infinitely dense point as a universe?
     
  2. jcsd
  3. Feb 11, 2015 #2

    PeterDonis

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    2016 Award

    Staff: Mentor

    Because there is less of it, and because the density of any kind of matter (including dark matter) decreases as the universe expands, whereas the density of dark energy stays the same, and "impact on the universe" is a function of density.

    There's no point in speculating about what could happen under different laws of physics; there are too many possibilities and no way of judging between them since the question rules out experiments (the reason we believe in our current set of physical laws and not others is that experiments have ruled out other possibilities). So this question isn't answerable as a scientific question, and is out of scope for this forum.
     
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