http://upload.wikimedia.org/wikipedia/commons/d/d7/LorentzianWormhole.jpg
Lorentzian wormhole known as Schwarzschild wormhole or Einstein-Rosen bridge. A singularity or Black Hole that connects two points in space, or two dimensions.

In 1916 Einstein came up with his general theory of relativity. It remains today as the standard model for gravitation theory. Two decades later, in 1933, he and his collaborator Nathan Rosen, published a paper showing that inside the theory of relativity was a curved-space structure capable of joining two distant regions of space-time through a tunnel-like curved spatial shortcut, a wormhole.

The original purpose of Einstein and Rosen paper was not to promote faster-than-light or inter-universe travel, but simply to explain fundamental particles like electrons as space-tunnels threaded by electric lines of force. The Einstein-Rosen Bridge is based on the generally relativity theory and the work done by Schwarzschild in solving Einstein’s equations; one of the solutions to these equations was the prediction of Black Holes.

The basic idea of wormholes dates nearly as far back as the concept of general relativity. A few months after Einstein wrote down his equations, the first exact solution of the Einstein equations was found by Karl Schwarzschild, it was called the Schwarzschild Radius (the farthest visible point), where the Black Hole gravity would become so strong that not even light could escape.

However in the Einstein-Rosen theory the idea of objects larger than electrons being able to pass through a wormhole was not even considered and so the scenario that science fiction writers portray today about the Einstein-Rosen Bridge is not correct.

A wormhole is a theoretical opening in space-time that is the mathematical solution to general relativity. If one day this was proven it could be used to travel to far away locations very quickly. It has never been proven that worm holes exist and there is no experimental evidence for them. Despite the theory, wormholes have been classified in two different types: Lorentzian wormholes and Euclidean wormholes.

http://upload.wikimedia.org/wikipedia/commons/a/af/Worm3.jpg
A wormhole in a curved 2D space.
Source(s):
http://www.krioma.net/articles/Bridge%20Theory/Einstein%20Rosen%20Bridge.ht...

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