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Time Travel, One Photon at a Time — Parallax Forums

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  • They showed that one photon can pass through a wormhole and then interact with its older self.
    That's a telephone line through time!
    ;-)
  • Heater.Heater. Posts: 21,230
    Great, so now we can vaporize you into photons. You can fly back in time and kill your own father, thus creating the archetypal time travelers paradox. Of course that might be a bit tricky seeing as you are just a bunch of photons.
  • That would have to be our past, not the photon's past. To a photon, there is no passage of time. The simulation (remember, it's just that) plays with the grandfather paradox, as well as the quantum mechanics of time.

    This is a bit old as far as news goes. Here's a more indepth piece that offers additional info, as well as opposing thought:

    http://physicsworld.com/cws/article/news/2015/feb/05/photons-simulate-time-travel-in-the-lab
  • ercoerco Posts: 20,256
    First time travel, now UFOs. What a week!

    http://www.foxla.com/home/173620683-story
  • yetiyeti Posts: 818
    edited 2016-07-14 06:29
    "Remember a UFO is an unidentified flying object," Streetcap1 wrote in the video description. "This could well be a meteor or the like. What made it interesting was the camera cut off when the UFO seemed to stop."
    "Unidentified flying object" does not automagically mean extraterrestrial.
    Maybe the stream had to be cut off because it's a secret military action and they just did this some seconds too late...
  • Maybe it wasn't NASA who cut off the signal, but the aliens! These guys have traveled trillions of miles to get here (unless they're from those underground cities of Mars), possibly using faster-than-light propulsion. Ya have to figure they can fiddle with lousy radio waves.

    Take *that* for a conspiracy theory!
  • Maybe our ways of broadcasting are for aliens what morse is for generation iPhone, so the chance that they don't even take it serious is greater than zero. Maybe they just classify it as electromagnetic junk from our ridiculously slow computers...
  • ercoerco Posts: 20,256
    In the original movie "Independence Day", the heroes use the 1947 Roswell crashed ship to casually fly up to the mothership and upload a virus. Apparently space ship and computer technology (as well as communication & encryption protocol) had not changed in 50 years. Just like loading UNIVAC into a Sopwith Camel casually contacting and setting up a midair refueling from a KC-135.

    http://acronyms.thefreedictionary.com/NKAWTG
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    I don't know erco...perhaps you're over-analyzing it. In relative terms we made a huge leap in technology in the last 100 years. However the aliens in the movie were probably already at the peak of theirs and were travelling for years through space. Not likely to improve so much in that time I would think. Can't wait until the new movie is on Blu-Ray. :nerd:
  • kwinnkwinn Posts: 8,697
    erco wrote: »
    In the original movie "Independence Day", the heroes use the 1947 Roswell crashed ship to casually fly up to the mothership and upload a virus. Apparently space ship and computer technology (as well as communication & encryption protocol) had not changed in 50 years. Just like loading UNIVAC into a Sopwith Camel casually contacting and setting up a midair refueling from a KC-135.

    http://acronyms.thefreedictionary.com/NKAWTG

    It would be quite an accomplishment to get a UNIVAC into a Sopwith Camel, never mind powering it.
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