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>>>>...So, lets talk about the Fourth Dimension -Time Travel... That too is physics, is it not? Suppose I could travel back in time...>>>

No, time travel is not physics. Time travel would be in violation of Newtons fundamental laws of thermodynamics, upon which all of the science of physics is based.

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Flatfoot sez: Call me when 'Talent-in-a-Box' is ready to ship! -- [8{>

Got some tunes on You Tube:
http://www.youtube.com/user/flatfoot50
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My BiaB lesson site:
http://jdwolfe0.wixsite.com/learnbiab