Definition

Introduction
History
Definition
Problems
Solutions
Time Travel
Conclusion
Bibliography

From http://news.bbc.co.uk/olmedia/710000/images/_710812_worm_hole_inf3_300.gif

A wormhole is a tunnel in space that matter can traverse through. It works in four dimensions with time being the fourth. It connects two points in the universe. A useful analogy for how a wormhole works is a two-dimensional piece of paper with a pair of dots on it. An ant wishes to go from one dot to another. It can walk from one point to another, but it would be significantly faster to fold the piece of paper and let the ant take a shortcut. A wormhole works on the same basic principle. As space is curved, the distance between the two points is significantly less when traversed by the wormhole instead of the direct route. One place where wormholes are theorized to exist naturally is in a black hole. To this day however, no wormhole has ever been proven to exist.

From http://www.anu.edu.au/Physics/courses/A07/studentsites/studentsites2001/The_Big/wormhole2.jpg
From http://www.cnn.com/2001/TECH/space/05/08/black.hole/story.black.hole.jpg

The event horizon of a black hole.