/u/kwizzle's posts in /r/askscience
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If a wormhole is problematic to sustain because it will collapse on itself and requires matter with negative mass to counter act this...
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If a wormhole is problematic to sustain because it will collapse on itself and requires matter with negative mass to counter act this, would it be possible to make a sphere of dense material around it that would pull on it enough to stop it from collapsing?
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