Have you heard the one about taking one end of a wormhole and going on a roundtrip close to the speed of light for 10 years? Then when you return, about 1000 years has passed where you left the other end of the wormhole. The idea is then you step through the wormhole that you brought with you and you are supposed to exit the other end 1000 years in the past.
That's complete bollocks![/b]