time travel?

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Zero Point energy is a scientifically proven fact as proven in the Casimir effect. However, humanity needs to design a workable "free energy" device. Your correct, that Zero Point energy could be used to achieving FTL travel and maybe time travel. There are unverified anecdotes of inventors or researchers detecting time anomalies. Daniel Greenberger and Karl Svozil has given a model for time travelk without paradoxes but they seem to be in direct contradiction of Einstein,Thorne,and Hawking over paradoxes. Maybe Greenberger and Svozil are correct. We would have to build a time machine to find out who is right.

http://www.daviddarling.info/encycloped ... simir.html
http://en.wikipedia.org/wiki/Casimir_effect
http://www.padrak.com/ine/ZPES
http://en.wikipedia.org/wiki/Time_travelCIAM.html

I think one of the main concerns with utilizing zero-point energy is the fact that zero-point energy means that is the lowest possible energy state a particle could theoretically obtain, as defined by the Quantum Theory. To harness zero-point energy would make a particle go to an even lower energy state, and scientists are debating whether or not it can be done.

I wish time travel was possible NOW,so i could change MY past...

Don't give your hopes up, for there are plenty of theories out there that allow time travel but don't allow one to change their past...

Actually that's an illustratioin of how Alcubierre (warp) drive works.

http://en.wikipedia.org/wiki/Alcubierre_drive

From what I understand time travel is possible but the time machine would have to be running during the moment you want to travel to... not very useful if you want to order pancakes during the Renaissance.

Actually, there is one form of time travel that is possible. According to General Relativity, if your speed is at near the speed of light, you would age much more slowly. Therefore, you would be sort of be traveling into the future. I think Kip Thorne has suggested that in order to travel into the past, you would have to build a wormhole with one end at a spacecraft and have that speed up to near light speeds. With this method you could at least travel decades into the past, but unfortunently you would not be able to travel back into the Middle Ages or something.

They say time travel will be possible in 250,000 years time.

Traversable wormholes are a special kind of Lorentzian wormholes which would allow a human to travel from one side of the wormhole to the other. Serguei Krasnikov tossed the term spacetime shortcut as a more general term for (traversable) wormholes and propulsion systems like the Alcubierre drive and the Krasnikov tube to indicate hyperfast interstellar travel.