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In physics, a wormhole is a hypothetical topological feature of spacetime that is, fundamentally, a "shortcut" through space and time. Simply, spacetime is a two-dimensional (2-D) surface that, when "folded" over, allows the formation of a wormhole bridge. A wormhole has at least two mouths that are connected via a throat or tube. If the wormhole is traversable, then matter can "travel" from one mouth to the other via the throat.