Tuesday, April 14, 2009

Great Scott!!!



A. If time travel is possible, why has no one from the future ever come back and told us? People act like it's only a matter of time until scientists figure it out, but flash forward 200 years to when they have supposedly figured it out, why haven't any of those people come back and visited us in the past 100 years - have you, your parents, or your grandparents ever heard about or met anyone from the future? Perhaps it's not invented for another 1000 years and maybe they don't consider any of the last 100 years to be interesting enough to waste 2 time machine tokens on, I don't really know. I don't think time travel is possible.

B. I suppose that a better question is do you think it's plausible that there are multiple time lines running at once? In other words, are our past-selves and future-selves living out their lives at the same time we are experiencing it or is time more of a one way street? Once something has happened, you can't go back. And something that hasn't happened yet, can still be determined with infinite outcomes. That's really my main problem with time travel - it suggests some sort of pre-destination to our actions. I hate the thought that I don't control my own destiny.

C. Time Travel Paradox: If time travel were possible, and you went back to the past and killed your parents before they had you, what would happen? Would you cease to exist and just disappear? But if your parents died before ever having you, then you were never born. If you were never born then how did you travel back in time to kill your parents?

24 comments:

  1. Time Travel:
    Going forward - Possible and already done.
    Going backward - Impossible

    If you kill your parents, then pictures of you and your brother and sister slowly fade while you play the guitar at a high school dance. Duh!

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  2. http://www.pbs.org/wgbh/nova/einstein/hotsciencetwin/

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  3. Yeah I remember that example from high school physics. Where the two twin brothers experience different amounts of time, one stays on Earth while the other goes into space traveling at a certain speed. When he returns, not much time has passed for him, but a lot of time as gone by on Earth. It has to do with the theory of relativity and our limitation of measuring time. Do you consider that time travel?

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  4. I agree. Going back in time is impossible. Traveling into the future however is possible. For those of you who did not argue about this for days and then go to the library and research it, time is relative.

    The closer you are moving to the speed of light, time slows down. In a sense, every time you jump in the car or take a plane trip you are traveling into the future. Because of the low speed involved (compared to the speed of light), it is not even noticeable...but this is eventually how traveling in space will be possible. If we ever create technology that allows us to reach speeds close to the speed of light, we could travel to other worlds. While the perspective from earth is that the trip could take hundreds or even thousands of years, for those traveling it could only be a period of days or months (obviously depending on how fast you are traveling).

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  5. Brett- I guess you guys are right. In your scenario, if that person comes back to Earth after a few years their time, but 200 years has passed on Earth then that that person has time traveled. So let's say that they strapped you into the atom smasher in France and you got really close to going the speed of light, what would the people in your time see? Would they see you start to accelerate, then turn into a blur, and then disappear because you are moving too fast for them to see?

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  6. And then once you slowed down your speed, you would slowly come back into view, and when you came to a stop you would be in the future? So really the Back to the Future car idea isn't that far off from a good theory. Except that only Back to the Future 2 would work because you can only go into the future. And instead of hitting 55 mph, the car would need to go a lot faster, and it would probably be beneficial for it to be in a contained closed loop so it could really build up speed without hitting anything.

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  7. Jake, I'm not sure how it's not time travel. I mean, "time" is just something humans created to measure something that, because of physical limitations, everyone experiences the same. When we develop the ability to travel millions of miles per hour, "time" will no longer be common to all people and will become obsolete. So, I guess I see what you're saying, but looking at it that way, then no, I don't believe time travel is possible, because I don't believe in magic. Basically, what I want to ask is, "Have you ever transcended space and time?"

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  8. Jake, it's 88 mph in the Delorian, and you need a damn flux-capaciter! See, Doc Brown has to fall off his toilet and hit his head before the idea of the flux-capaciter can even come to fruition.

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  9. "You're here, I'm here, and over here is the Eiffel Tower"

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  10. I'm sure that in 1985, you can pick up plutonium at any corner drug store, but in 1955, it's a little hard to come by!!

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  11. And in the link I posted, I was more interested in the test that they did with the atomic clocks (bottom of page). So, considering that I have more speeding tickets than anyone I know, indicating I drive exceptionally fast, and I have spent so much time on the highway driving back and forth to NY and STL, I feel as though, I am much, much younger than Dylan (I use "much, much," because, as has been said, time is relative).

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  12. Assuming Dylan and I were born at the exact same time....

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  13. Time is relative indeed. For example, what did the snail say when he was riding the turtle?

    "WEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!"

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  14. Did you get that joke off of a laffy taffy wrapper?

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  15. That joke makes me want to do what my dog did 5 seconds before I walked out the door this morning to go to work...and that's vomit all over the place.

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  16. Dylan would be as young as you, Casey, if only he hadn't been slowed down by the dashboard of his Tahoe.

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  17. No more jokes from that guy.
    Time travel as perceived by the general public and science fiction is not possible. That is to be able to travel into the future and see what it is going to be like or travel into the past and be able to change what has already happened. The idea makes for great movies but not reality. I also can’t stand the idea of pre-destination and that I don’t control my own destiny.
    If “time” is something that humans have created, then whether or not you are traveling at the speed of light or in a car wouldn’t the amount of time that passes stay the same? You could travel a longer distance in the same amount of time, but ultimately it is still the same amount of time no matter how far or fast you go. You could travel overseas in a standard plane in the same amount time you could travel to another world at the speed of light; however there would be no change in the amount of time that either ship experiences. I think time will always be common to people as a tool of measurement but I don’t think that it will be as much of a factor in our daily lives once we can travel that fast.

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  18. Eric, the time doesn't stay the same. That's the whole point of the "time is relative" idea. "Time" of a person standing still passes at a different rate than "time" of a person going a million miles per hour, even if they were going a million miles per hour in a 2 foot circle (meaning they practically stay in the same spot). Read about the atomic clock experiment at the bottom of the page http://www.pbs.org/wgbh/nova/einstein/hotsciencetwin/

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  19. Yes, time travel is possible. Get in an airplane and fly across the time zone...poof. You have gained or lost a few hours.

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  20. Yeah I know. I just don’t really understand why time slows down the faster you go. It seems like time would just “appear” to move slower. Then again Einstein was a lot smarter than I am.

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  21. how can you believe going forward is possible but going backward is impossible? Does that mean that if you travel into the future you're stuck there?

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