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| Moderated by: Brian | Page: 1 2   |
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Lady Cop Pioneer100© Member  BAH HUMBUG
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Physicist Says Time Travel Is Not Only Possible, but Likely Wednesday, April 02, 2008  NASA A spaceship enters a wormhole in a NASA artist's illustration. Time travel? Teleportation? No problem, says renowned physicist Michio Kaku. Kaku, a professor at the City University of New York, is creating quite a stir in Britain with the release of his new book, "The Physics of the Impossible." On this side of the pond, outlandish claims in books are recognized as, well, a good way to sell books. But in Blighty, Kaku's being treated as if he's Doctor Who informing dim-witted humans about the wonders of the Universe, with front-page treatment Wednesday in both the Daily Telegraph and the Guardian. Even the normally staid Economist is chiming in. Kaku, one of the earliest proponents of string theory, still a contentious issue among physicists, divides the most common science-fiction tropes, or "impossibilities," into three categories — possible soon, possible in the far future and really, truly impossible. Category 1, as he dubs it, includes things that may become true within the next century, if not the next few decades: teleportation (already possible, but only among subatomic particles); telepathy (thanks to brain implants); invisibility (already being researched using light-bending 'metamaterials'); laser guns (existing, but hugely power-hungry); force fields; and the discovery of extraterrestrial life. Category 2 includes things that are theoretically possible but would be realized only with thousands more years of technological progress: time travel (possibly through "wormholes" in space); traveling faster than light; and the discovery of parallel universes. Category 3 consists of things that really are impossible because they violate the laws of physics. Only two concepts qualify: knowing the future and perpetual motion. "The Physics of the Impossible," released March 11 in the U.S., is currently No. 123 on the Amazon bestseller lists. It comes out Thursday in Britain, though without the "Doctor Who"-themed cover of the U.S. version. • Click HERE to read the Telegraph report, HERE for the Guardian write-up, HERE for a review in the Seattle Times and HERE for a brief online-only interview in the New York Times.
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24HourNut Administrator  Body pillows rock!
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If I could travel back in time I would have required from you a bucket of those Florida garlic crabs shipped overnight to me as the admission price into 24.  
The best human beings start good new topics and vote on the better posts. |
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Lady Cop Pioneer100© Member BAH HUMBUG
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24HourNut wrote: If I could travel back in time I would have required from you a bucket of those Florida garlic crabs shipped overnight to me as the admission price into 24. OK Frank, now you have crabs.  
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Brian Grand Poobah of Moderation 
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Time travel is a difficult issue. All of the things that would make time travel actually useful are paradoxical, at best, and therefore probably impossible. I think the scientist here is wrong to look at it as just a technological hurdle. The logical hurdle is much greater. The Grandfather Paradox is a fairly significant hurdle to overcome. Even if time travel was possible to the past, you'd probably only be able to do it as an observer. You wouldn't actually be able to change anything, which, I think, would be why most people would want to do it in the first place. On the other hand, it would be a great way to teach kids history. 
"It's been a long December, and there's reason to believe maybe this year will be better than the last." -- "A Long December", Counting Crows |
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librtyhead Original500© Member 
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I would be fairly happy to be 20 min ahead of everyone on the planet........wait .....let me think, I may not need that much time. ........I'll be back.
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Saint Forum-Blogger© Pioneer100© Member  Polymath
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Brian wrote: Time travel is a difficult issue. All of the things that would make time travel actually useful are paradoxical, at best, and therefore probably impossible. I think the scientist here is wrong to look at it as just a technological hurdle. The logical hurdle is much greater. I disagree, Brian. You could avoid that paradox if time was branching and not a steady stream. In fact, another you on another branch may have already met yourself. The act of meeting yourself would create a branch in time creating two branches where one of you had met himself and one where you had not. You are the branch which, by definition, has never met himself.
A^2 + B^2 = C^2 |
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librtyhead Original500© Member
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Brian if every other branch is yourself and you were falling out of a tree and only hit every other one you would be safe.
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Saint Forum-Blogger© Pioneer100© Member Polymath
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Oh...wait. The thread was where would you go? I'd like to see, in order: 1. Jesus on the mount. It'd be fascinating to learn ancient Hebrew and walk up to Him and have a conversation. (Although he'd already know I was coming!) 2. Abraham Lincoln, first at his law office as a customer. Then at Gettysburg. 3. Hiroshima just before the blast....then just after. NOT during! 4. Rome at it's height, preferably on a Colloseum fight day. 5. The gunfight at OK Corral. 6. D-Day. 7. The Asteroid strike that extincted the dinosaurs. 8. The Titanic as it was sinking. 9. Winston Churchill when he was young. 10. The Assassination of JFK. 11. The 200th floor of the Twin Trade Towers in the second building as the first was hit. (Scratch that one, too emotional.) 12. The moment Gibraltar gave way and the ocean rushed in to the Mediterranean. 13. Krakatoa. 14. Valley Forge. 15. Independence Hall on July 4th 1776.
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librtyhead Original500© Member
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I'm sorry I thought time travel had no bounds and immediately thought of moving forward if only for a nano-second..........now thats progress. To go "back" I would choose when I was 7 and had not a bit of knowledge of the world.  O.K. I would have liked to have talked to Thomas Jefferson or Benjamin Franklin....  Ben was a party animal!...........We would have fun. Seriously.....  Last edited on 02:17 am by librtyhead |
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24HourNut Administrator Body pillows rock!
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Seriously, I would love to go back and see the dinosaurs live, as well as key events like the first humans to make a fire, the first pre-hominids/primates to leave the forest for the plains, the asteroid that destroyed the dinosaurs, etc... all while magically kept safe of course. 
The best human beings start good new topics and vote on the better posts. |
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UsedToRide Original500© Member  ^^^That is LOVE!!^^^
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I'd go back only a little ways....to 1 July 2005 and keep Bullet home that night.
Respect some, trust one, fear none ~~Bullet http://www.freeholbrook.com The degree of civilization in a society can be judged by entering its prisons. ~~Dostoyevsky |
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foxglovepress Forum-Blogger© Original500© Member  NON-PC!!
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UsedToRide wrote: I'd go back only a little ways....to 1 July 2005 and keep Bullet home that night. God......that's so sad. That breaks my heart UTR. I know you probably can guess the day I would go back to also. I wish we could go back in time...................
Justice for Mark.....Imprison Employers Who Hire ILLEGALS! |
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UsedToRide Original500© Member ^^^That is LOVE!!^^^
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foxglovepress wrote: UsedToRide wrote:I'd go back only a little ways....to 1 July 2005 and keep Bullet home that night. You wouldn't be going back decades either, would you? Just a few years like I would do. You'd keep Mark home that day, I'm pretty damn certain.
Respect some, trust one, fear none ~~Bullet http://www.freeholbrook.com The degree of civilization in a society can be judged by entering its prisons. ~~Dostoyevsky |
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Lady Cop Pioneer100© Member BAH HUMBUG
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i'd like to observe the court intrigue and history of the reigns of Henry VIII and Elizabeth I. then move up to Queen Victoria's reign and find out who Jack the Ripper really was!
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Prince colin Forum-Blogger© Pioneer100© Member 
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Everything happens for a reason why screw around with something you have no clue on in the first place? so your life can be better,what about the problems that could arise from such actions ever think of that? When and if time travel is possible i'm not one to change my past, my past happened for a reason and who am i to question that reason?
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