Albert Einstein's theory of general relativity suggests that time am the past is possible via rotating wormholes and/or black holes. The actual technical usefulness of actually carrying out such into adulthood need not concern us since this essay is in the realm of the thought experiment. Now Stephen Hawking says time am the past is not possible because he suggests that there is such a thing as a yet undiscovered Chronology Protection Conjecture that prevents this and thus makes the world safe for historians. I've come up with a specific theory of time travel into the past that incorporates Einstein's general theory of relativity; Hawking's Chronology Protection Conjecture, along with other assorted bits like parallel universes that are thrown into the mix.

Time travel is a staple in sci-fi stories, novels, films and TV series. And, time travel is possible -- theoretically. We all know about journeying to the future which we do at the rate of one second per second whether we like it or not. After that, if one travels at close to light transfers relative to your home of origin then you can am the removed future (with respect to that place of origin) without aging an equivalent number of years (the twin paradox). Am the past is apparently allowed too, via the weird physics inherent in rotating earthworm holes and perhaps Black Holes which is where Einstein's general theory of relativity is needed. The problem there is that relativity theory surmises earthworm holes, if they exist at all, will exist for nanoseconds and grow very tiny to start, and thus a lot of useful in the foreseeable future for the purposes of time travel. Because we don't know exactly what the medial side of a Black Hole is, and where it leads, if anywhere, current thinking suggests that jumping into Black Holes are a more useful opportinity for committing suicide than for planning a trip to the past, but the jury is still on that one.

Anyway, the fun bit about time travel is the various paradoxes that arise, the most famous one being the grandaddy paradox. That is, what if you travel back in time and kill your grandaddy before he sired your father (or mother). If you did that it means that you could not have been born, but if you were never born you couldn't go back in time to kill your ancestor. This is the sort of stuff sci-fi authors (and philosophers) love -- ditto physicists! Definitely the time travel paradox however is the one where you get something for nothing. Say you have this edition of "Hamlet", and you want Shakespeare to autograph it boat tours malta. So back you go in time to Shakespeare's era. You affect on his door, but the housekeeper says he's out during the day but if you leave the book quite possibly autograph it and you can visit and collect it next morning. When Shakespeare returns, he sees the book, reads it, and is so impressed he pays the night making a copy. You come back the next morning, collect your now autographed edition of "Hamlet", and return for this day with your now very valuable book. The question now becomes, where did the original "Hamlet" come from? You didn't write it; but Shakespeare didn't either as he plagiarized your copy which he then passed it off as some work.

Another favorite is you meeting yourself. Say you're 50 and not all that well off. You get the brilliant idea traverse back in time and get your younger self to buy some stocks you know will pay off big time later on down the track. And so it comes to pass that your younger self so invests, and becomes mucky rich, only, in leading such a high life, is disapated of a heart attack at the age of 45! Or you always regretted not suggesting to the love of your life when you were young, and thus head off and get your younger self to muster in the daring and do so. He does, but as they fly off on their vacation to europre, the airline goes to hell with no survivors. Sometimes you don't know when you're well off.