Hmm (Score 1)

There's some fairly indepth research being done within the Quantum Physics arena here in Australia that deals with the theoretical modification of past events. That is to say, you MAY not be able to "travel back in time" but in theory it is possible to change the past to put a positive spin on the present. Of course, it's pure theory however I believe this whole thread is based on theory. I only know of this particular study being done as I'm close friends with a few of the researchers. :) Just my 2c.