This is a compendium of links from a fellow researcher.

Scientific American reposted a November-2003 article by Michio Kaku entitled "Borrowed Time". It postulated how General Relativity and Quantum Mechanics allows -- in theory -- for alternate timelines within a Multiverse and "time machines". I archived it at http://www.stealthskater.com/Science.htm#Ekpyrotic (the 4th item). Prof. Max Tegmark wrote an article about 4 possible models for parallel universes (including Everett/Wheeler 'Many Worlds') for Scientific American, and it precedes Dr. Kaku's essay in the list (the 3rd item).<o:p></o:p>

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Ed Halerewicz, Jr. is adept at translating technical physics for the layperson (such as myself). In an e-mail, Ed said there's actually more than 4 parallel universe models but added the jury is still out as to their actual existences. He thought Paul Davies is a better author for time-travel in general and that Gott had the best technical physics for this subject.<o:p></o:p>

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Ed and Dr. Paul Hoiland wrote an e-book that explains the 'Science' in "Warp Drive" based on battle-tested GR and QM. If you have read about topics such "Clifford Algebra" and "Bell's Theorem" before but have no idea as to what the math looks like, they are covered in this manuscript. The "gist" of it, says Ed, is that there is no "blue smoke & mirrors" (i.e., sci-fi magic) in Warp Drive. Einstein's GR allows for it. It is more of an engineering challenge to produce the effects that theory allows. The original DRAFT version is in ZIP-ed .pdf format. I corrected some grammar errors in a ZIP-ed MS-Word .doc . Both downloads are accessible at http://www.stealthskater.com/Science.htm#Halerewicz .<o:p></o:p>

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Some physicists have "extrapolated" from the basic principles of Warp Drive to create their own particular models. And a few engineers have produced designs for "ufo"-type craft based upon their interpretations of warp drive science. Ed critiques some of these at the aforementioned URL. Paul and Ed are among founding members of the "Journal of Advanced Propulsion Methods" => http://www.joatp.org/ .<o:p></o:p>

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Ed Halerewicz, Jr.'s homepage => http://da_theoretical1.tripod.com/index.ht...gt;</o:p>

Prof. Max Tegmark's homepage => http://www.hep.upenn.edu/~max/<o:p></o:p>

Dr. Michio Kaku's homepage => http://www.mkaku.org