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Space-time fabric

  1. Dec 16, 2005 #1
    If space-time looks like a piece of fabric (or an inflating balloon, in the inflation analogy) what is on the other side of the fabric?
    Or does space-time not look like a piece of fabric at all...? Like some scientists are suggesting that it is a fluid....?
  2. jcsd
  3. Dec 16, 2005 #2
    The "fabric of spacetime" is a visual aid, nothing more. It's just that people have a hard time visualizing four dimensional curved manifolds, so it helps to break things down a little.

    Imagine that you lived in a purely three dimensional cartesian space, such as [itex]R_3[/itex], and one day someone asked you what was on the other side. It's not really a question you can answer.
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