WORMHOLE

 A Wormhole is a theoritical passage through space - time that could create
shortcuts for long journeys across the universe. Wormhole are predicted by the
theory of relativity.

Wormholes are first theorized in 1916  through that wasn't what they were called at the time.
In 1935, Einstein and Physicist Nathan Rosen used the theory of general relativity to elaborate on the idea, proposing the existence of "BRIDGES" through Space - time. Those bridges connect two different points in space - time, theoriticaly creating a shortcut that could reduce travel time and distance. The shortcuts came to be called
"Einstein - Rosen Bridges" or" Wormhole"
A Wormhole could create extremely long distances such as a billion light years or more, two different universes, or different points in time.
 NASA's Eric Christian wrote - "A Wormhole is not really a means of going back in time, it's a shortcut, So that something that was far away is much closer."

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