According to string theory, hypothetical shortcuts through spacetime called wormholes, might well exist in our Universe.
For those of you who wouldn’t be Stargate fans, wormholes would be “tunnels” between two different locations in the Universe (they could also allow to travel in time, or to parallel universes). Basically, while it would normally take millions or even billions of years to go to a remote destination, a wormhole would allow you to go there in a handful of seconds.
Wormholes appeared as mathematical solutions to the Einstein field equations, and they’ve never been observed (a mathematical possibility is not necessarily a physical reality).
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