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the possibility of traversable wormholes in general relativity was first demonstrated by kip thorne and his graduate student mike morris in a 1988 paper.
the possibility of traversable wormholes in general relativity was first demonstrated by kip thorne and his graduate student mike morris in a 1988 paper.

=== time travel ===the theory of general relativity predicts that if traversable wormholes exist, they could allow time travel.
=== time travel ===the theory of general relativity predicts that if traversable wormholes exist, they could allow time travel.

== traversable wormholes ==lorentzian traversable wormholes would allow travel from one part of the universe to another part of that same universe very quickly or would allow travel from one universe to another.
== traversable wormholes ==lorentzian traversable wormholes would allow travel in both directions from one part of the universe to another part of that same universe very quickly or would allow travel from one universe to another.

later, other types of traversable wormholes were discovered as allowable solutions to the equations of general relativity, including a variety analyzed in a 1989 paper by matt visser, in which a path through the wormhole can be made where the traversing path does not pass through a region of exotic matter.
later, other types of traversable wormholes were discovered as allowable solutions to the equations of general relativity, including a variety analyzed in a 1989 paper by matt visser, in which a path through the wormhole can be made where the traversing path does not pass through a region of exotic matter.

an example of a (traversable) wormhole metric is the following::formula_1one type of non-traversable wormhole metric is the schwarzschild solution (see the first diagram)::formula_2== in fiction ==wormholes are a common element in science fiction as they allow interstellar (and sometimes interuniversal) travel within human timescales.
an example of a (traversable) wormhole metric is the following::formula_1one type of non-traversable wormhole metric is the schwarzschild solution (see the first diagram)::formula_2== in fiction ==wormholes are a common element in science fiction as they allow interstellar, intergalactic, and sometimes interuniversal travel within human timescales.