Slappie 9 #1 June 23, 2005 Those silly brits, they'll ponder anything. I love this topic though. Time travel... Quote New model 'permits time travel' By Julianna Kettlewell BBC News science reporter If you went back in time and met your teenage parents, you could not split them up and prevent your birth - even if you wanted to, a new quantum model has stated. Researchers speculate that time travel can occur within a kind of feedback loop where backwards movement is possible, but only in a way that is "complementary" to the present. In other words, you can pop back in time and have a look around, but you cannot do anything that will alter the present you left behind. The new model, which uses the laws of quantum mechanics, gets rid of the famous paradox surrounding time travel. Paradox explained Although the laws of physics seem to permit temporal gymnastics, the concept is laden with uncomfortable contradictions. The main headache stems from the idea that if you went back in time you could, theoretically, do something to change the present; and that possibility messes up the whole theory of time travel. Clearly, the present never is changed by mischievous time-travellers: people don't suddenly fade into the ether because a rerun of events has prevented their births - that much is obvious. You go back to kill your father, but you'd arrive after he'd left the room, you wouldn't find him, or you'd change your mind Professor Dan Greenberger, City University, New York So either time travel is not possible, or something is actually acting to prevent any backward movement from changing the present. For most of us, the former option might seem most likely, but Einstein's general theory of relativity leads some physicists to suspect the latter. According to Einstein, space-time can curve back on itself, theoretically allowing travellers to double back and meet younger versions of themselves. And now a team of physicists from the US and Austria says this situation can only be the case if there are physical constraints acting to protect the present from changes in the past. Weird laws The researchers say these constraints exist because of the weird laws of quantum mechanics even though, traditionally, they don't account for a backwards movement in time. Quantum behaviour is governed by probabilities. Before something has actually been observed, there are a number of possibilities regarding its state. But once its state has been measured those possibilities shrink to one - uncertainty is eliminated. So, if you know the present, you cannot change it. If, for example, you know your father is alive today, the laws of the quantum universe state that there is no possibility of him being killed in the past. It is as if, in some strange way, the present takes account of all the possible routes back into the past and, because your father is certainly alive, none of the routes back can possibly lead to his death. "Quantum mechanics distinguishes between something that might happen and something that did happen," Professor Dan Greenberger, of the City University of New York, US, told the BBC News website. "If we don't know your father is alive right now - if there is only a 90% chance that he is alive right now, then there is a chance that you can go back and kill him. "But if you know he is alive, there is no chance you can kill him." In other words, even if you take a trip back in time with the specific intention of killing your father, so long as you know he is happily sitting in his chair when you leave him in the present, you can be sure that something will prevent you from murdering him in the past. It is as if it has already happened. "You go back to kill your father, but you'd arrive after he'd left the room, you wouldn't find him, or you'd change your mind," said Professor Greenberger. "You wouldn't be able to kill him because the very fact that he is alive today is going to conspire against you so that you'll never end up taking that path leads you to killing him." Greenberger and colleague Karl Svozil introduce their quantum mechanical model of time travel on the ArXiv e-print service. So if you could go back in time and not possibly change the future. What would you do? Link to story "Find out just what any people will quietly submit to and you have found out the exact measure of injustice and wrong which will be imposed upon them." Quote Share this post Link to post Share on other sites
IanHarrop 42 #3 June 23, 2005 I like to watch "Where troubles melt like lemon drops, away above the chimney tops, that's where you'll find me" Dorothy Quote Share this post Link to post Share on other sites
Slappie 9 #4 June 23, 2005 Wow it's not a sex thread so it's going to flounder down to the bottom. Oh well. Let's change the question. Who would you do? "Find out just what any people will quietly submit to and you have found out the exact measure of injustice and wrong which will be imposed upon them." Quote Share this post Link to post Share on other sites
wingnut 0 #5 June 23, 2005 QuoteWho would you do? no one i would just tell myself to make sure i had condoms when i threw a party my senior year of high school, damn girlfriend was willing and i wasn't prepared..... ______________________________________ "i have no reader's digest version" Quote Share this post Link to post Share on other sites
Darius11 12 #6 June 23, 2005 Damn Dave please tell me you got some from her at a later timeI'd rather be hated for who I am, than loved for who I am not." - Kurt Cobain Quote Share this post Link to post Share on other sites
IanHarrop 42 #7 June 23, 2005 Yes there was a double-entendre "Where troubles melt like lemon drops, away above the chimney tops, that's where you'll find me" Dorothy Quote Share this post Link to post Share on other sites
Girlfalldown 0 #8 June 23, 2005 Quote Who would you do? I'd go back to 1989 when I was 18 and do myself. Is that weird? -------------- (Do not, I repeat DO NOT, take my posts seriously.) Quote Share this post Link to post Share on other sites
Rebecca 0 #9 June 23, 2005 Elvis Howard Hughes Einstein (ok, so maybe not 'do' - 'have a conversation with' is better) Errol Flynn For starters you've got to ask yourself one question: 'Do I feel loquacious?' -- well do you, punk? Quote Share this post Link to post Share on other sites
dixieskydiver 0 #10 June 23, 2005 QuoteQuote Who would you do? I'd go back to 1989 when I was 18 and do myself. Is that weird? Is it ok if I come back with you and watch? Dixie HISPA #56 Facil Rodriguez "Scientific research has shown that 60% of the time, it works every time." Quote Share this post Link to post Share on other sites
Slappie 9 #11 June 23, 2005 AH so funny how a topic change garners the posts. Funny how this forum revolves around sex. You are all so easy... "Find out just what any people will quietly submit to and you have found out the exact measure of injustice and wrong which will be imposed upon them." Quote Share this post Link to post Share on other sites
yardhippie 0 #12 June 23, 2005 QuoteQuote Who would you do? I'd go back to 1989 when I was 18 and do myself. Is that weird? it'd be like twins... thats HOT! Goddam dirty hippies piss me off! ~GFD "What do I get for closing your rig?" ~ me "Anything you want." ~ female skydiver Mohoso Rodriguez #865 Quote Share this post Link to post Share on other sites
yardhippie 0 #13 June 23, 2005 QuoteAH so funny how a topic change garners the posts. Funny how this forum revolves around sex. You are all so easy... this is a bad thing?Goddam dirty hippies piss me off! ~GFD "What do I get for closing your rig?" ~ me "Anything you want." ~ female skydiver Mohoso Rodriguez #865 Quote Share this post Link to post Share on other sites
Slappie 9 #14 June 23, 2005 QuoteQuoteAH so funny how a topic change garners the posts. Funny how this forum revolves around sex. You are all so easy... this is a bad thing? Not always. Again though, the threads topic is taken way out of context by a few words. It's entertaining in a psycological way just to see how you can push and prod a thread to take a certain turn or direction change. "Find out just what any people will quietly submit to and you have found out the exact measure of injustice and wrong which will be imposed upon them." Quote Share this post Link to post Share on other sites
wingnut 0 #15 June 23, 2005 QuoteDamn Dave please tell me you got some from her at a later time nope, wish i had, the opertunity never presented itself again before we broke up... last i heard she was finishing up her masters in florida.... ______________________________________ "i have no reader's digest version" Quote Share this post Link to post Share on other sites
yardhippie 0 #16 June 23, 2005 not me, I usually have the touch of death on a thread. Especially if I start it. Im just not entertaining enough i guess!! Goddam dirty hippies piss me off! ~GFD "What do I get for closing your rig?" ~ me "Anything you want." ~ female skydiver Mohoso Rodriguez #865 Quote Share this post Link to post Share on other sites
Squeak 17 #17 June 24, 2005 Leslie Carron Audrey Hepburn, Marilyn Monroe Rita Heyworth, Hell who eer would let meYou are not now, nor will you ever be, good enough to not die in this sport (Sparky) My Life ROCKS! How's yours doing? Quote Share this post Link to post Share on other sites
br0k3n 0 #18 June 24, 2005 Mary Magdalene, and i think i would call my son.. Hmmmm let say Jesus... then you can all call me Hmmmmm let say GOD.. ----------------------------------------------------------- --+ There are 10 types of people in the world: Those who understand binary, and those who don't.. --+ Quote Share this post Link to post Share on other sites
happythoughts 0 #19 June 24, 2005 QuoteQuoteDamn Dave please tell me you got some from her at a later time nope, wish i had, the opertunity never presented itself again before we broke up... last i heard she was finishing up her masters in florida.... See if you can get her phone number. I'll mail you a copy of the video. Quote Share this post Link to post Share on other sites
turtlespeed 226 #20 June 24, 2005 well, you baby - nough said . . .I'm not usually into the whole 3-way thing, but you got me a little excited with that. - Skymama BTR #1 / OTB^5 Official #2 / Hellfish #408 / VSCR #108/Tortuga/Orfun Quote Share this post Link to post Share on other sites
wingnut 0 #21 June 24, 2005 QuoteSee if you can get her phone number. I'll mail you a copy of the video i'll see what i can do, watch out though, she is blonde, was a sority girl and is sorta ditzy...... and very small... she had to sit on a pillow to see over th top of her stearing wheel in a geo metro..... just don't break her..... of course fr all i know she is 7 feet tall and 500 pounds now.... but i doubt it..... ______________________________________ "i have no reader's digest version" Quote Share this post Link to post Share on other sites
boinky 0 #22 June 24, 2005 QuoteWho would you do? I'm already doing him! Nina Are we called "DAWGs" because we stick our noses up people's butts? (RIP Buzz) Yep, you're a postwhore-billyvance Quote Share this post Link to post Share on other sites
Squeak 17 #23 June 24, 2005 QuoteMary Magdalene, and i think i would call my son.. Hmmmm let say Jesus... then you can all call me Hmmmmm let say GOD.. Mary magdelene was not Hey Zeus' MOM She was the prostitue that he saved You are not now, nor will you ever be, good enough to not die in this sport (Sparky) My Life ROCKS! How's yours doing? Quote Share this post Link to post Share on other sites
br0k3n 0 #24 June 24, 2005 QuoteQuoteMary Magdalene, and i think i would call my son.. Hmmmm let say Jesus... then you can all call me Hmmmmm let say GOD.. Mary magdelene was not Hey Zeus' MOM She was the prostitue that he saved really, damn, caught shagging a hooker again.... ----------------------------------------------------------- --+ There are 10 types of people in the world: Those who understand binary, and those who don't.. --+ Quote Share this post Link to post Share on other sites
goose491 0 #25 June 24, 2005 This is hogwash. All that is, is because you have decided it to be. Perception is reality and knowledge is power. These guys are just paving the way to make people think this is the truth. IMO, it is being done to avoid nasty messes once we all figure out how things really work. QuoteSo, if you know the present, you cannot change it. (emphasis mine) It is not what you beleive, it's what you know. Some of you may understand this for what it is, some of you may only think you do. The difference if Everything. A human could walk on water if he/she knew they could do it. It is not enought merely to think they can or beleive they can. These guys are aware of this and are trying to make their theory "common knowlege" to acheive a 100th monkey type phenomenon and make it truth. We are all making short trips to the past everyday via a technique we call memory. Know what you are capable of! My Karma ran over my Dogma!!! Quote Share this post Link to post Share on other sites
