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Travelling back in time IS possible, argues new science book


Traveling into the past is “difficult,” the author admits and there is one, crucial, limitation - you cannot travel back beyond the point when the first time machine is invented.
Rob Waugh – Fri, Oct 18, 2013

“Time travel to the past is possible,” says Colin Stuart, author of The Big Questions in Science.

“In fact, you can travel back in time, arrive three months before you left - and buy yourself a Christmas present before you set off.”

Travelling into the past is “difficult,” Stuart admits, and there is one, crucial, limitation - you cannot travel back beyond the point when the first time machine is invented.

“In fact, the inventor of the first time machine will find it impossible to use,” says Stuart, “Lots of people will think, “Oh, I’ll go back and meet the inventor!’ So he’ll probably spend most of his time shaking their hands.”

Travelling forward in time is relatively easy, most scientists agree - to go forward in time, you simply need to accelerate to speeds close to the speed of light.

As you get close to that speed, time slows down, but only for you, according to Einstein’s Theory of Special Relativity.

Travel far enough, and you could return thousands of years into the future. Travelling backwards, though, is much, much harder - but still, Stuart, says “possible”.

Stuart notes that we have, as yet, never seen a time-traveller - which argues that limitless travel through time is not possible.

Professor Stephen Hawking announced a “party” for time-travellers, with details of latitude and longitude, and invited visitors from the future. “None showed up,” says Stuart.

Stuart also points out that “time tourists” would visit moments such as the launch of the Titanic, or the assassination of JFK, “but they’re not in the photographs.”

Stuart’s method of travelling through time for a surprise Christmas gift is not easy, though - it requires travel to another star, a spacecraft that can travel at near light speed, and a gigantic amount of energy.

“What you would do is create a wormhole - you can use them to go backwards,” says Stuart. “What you would need is something really heavy - which bends space - or a huge amount of energy, to create a wormhole. There’s a rule in physics that you can borrow a huge amount of energy - as long as you pay it back quickly - it’s called the Heisenberg uncertainty principle.”

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Brian Cox argues that using wormholes is tricky - or, in fact, impossible

“You see it in particles in the Large Hadron Collider which pop in and out of existence. If you can somehow pay off that “debt”, you end up with a permanent wormhole in space - which would take you instantly to, say, another star.”

“To travel “back in time”, you simply have to attach one end of the wormhole to a spaceship, fly around at near the speed of light for a while (so time slows down for the spaceship), then jump through the wormhole.”

If the spaceship flew for five years, only six months would have passed within the wormhole - so if you jump through it to the alien star, then fly back to Earth (on yet another spaceship), you arrive three months before you left.

Because you rely on the wormhole, you can’t go further back than when the machine is invented - hence, perhaps, the reason we have never seen any time travellers. Either that, or the sheer amount of effort involved.

Stuart says that this method requires technology far beyond what we currently have, “This isn’t the time to do it,” he admits. “But there are stars that are billions of years older than ours - if there is life there, perhaps they can travel in time.”

Stuart says that while the idea is “possible” it does raise questions - “What happens if you arrive three months before you leave, then shoot yourself? We just don’t know.”

Thus far, the only things we can accelerate to near light speed are particles such as protons in accelerators such as the Large Hadron Collider.

Science writer Carl Sagan once offered the rather weak argument that time travellers might be among us already - but would “disguise themselves” to avoid disrupting the past.

Professor Brian Cox suggests, though, that the idea of a stable wormhole may not be realistic.

“In General Relativity, you can travel backwards in principle,” he said in a speech this year. “It's to do with building these things called wormholes; shortcuts through space and time. But most physicists doubt it. Hawking came up with the 'chronology protection conjecture' - physics we don't yet understand that means wormholes are not stable.”

The Big Questions in Science, published by Andre Deutsch, is out in November


http://uk.news.yahoo.com/travelling-back-in-time-is-possible--argues-new-science-book-140927121.html#SJGIiVU

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Comments

  • It does make you think, that's for sure. We may be being kept in the dark, and I am sure we are as with many other things that may be going on. Who knows, those of us the dream, maybe this is a way into another dimension, through a wormhole. Maybe that's why only some people dream, and remember all of them!!!

     

     

    1950s Time Travelling Teacher Evidence

    http://youtu.be/r5L0JtCSZ-o

    Uploaded on 26 Jan 2011
    This personally is the most convincing footage that i have ever seen in favour of time travel, experts have said that the video is clearly not faked this is evident from the general camera work, sound and picture quality throughout, there are methods such as sepia etc that enable you to make a video look older/old fashioned but there is currently no known technology that can recreate a piece this realistic, the clip appears to show the score of a sports game which will not be played until several years in the future, the ONLY other possible explanation other than time travel for this is that the teacher was conducting or had earlier conducted some kind of quiz of which they were playing the second game, two teams named 'giants' and 'rangers' achieved the same score as game 2 of the 2010 baseball world series between the Giants and the Rangers, if so what a coincidence?

    *ALL VIDEOS WERE FOUND FROM ACROSS THE WWW AND HAVE BEEN UPLOADED INTO ONE CHANNEL FOR THE EASE AND CONVENIENCE OF INTERESTED VIEWERS, I OWN NO RIGHTS TO THE ORIGINAL VIDEOS/UPLOADS, CREDIT MUST GO TO THE ORIGINAL SOURCE*

    3 TIME TRAVELERS Caught With CELL PHONES (Time Travel Proof?)

    http://youtu.be/RyCvKkANPZQ

    "Time Travel" has been discoveredl! Absolute proof? Or eerie illusion...

    http://youtu.be/hHgmIXF6k00

    Time Travel - Man finds a coin from the future?

    http://youtu.be/Y2Ib7n_UaaA

    Published on 22 Dec 2010
    A guy bought a newspaper and in the change he was given was a coin from the future, check the upload date of this video.

  • This made me think*

  • Very interesting, thank you Melodie.

    However, this made me thing -- can we not already time travel, WITH wormholes? We don't need a spaceship faster than the speed of light, and a machine to make a wormhole. All we need, is ourselves. Let's say we have 11 people in a room, they all sit in a circle, with the 11'th in the centre of the ring. The 10 on the outside direct Reiki into the middle person, if they have a high enough vibration, they could open a wormhole, the person in the centre sits in DEEP meditation, until he/she can see them self and the wormhole, they then use their mind to go through the wormhole, and speed out the 'other side'. Then showing them in their mind, maybe in the another dimension from out physical one, the past, or the future?

    Anyway, thanks again. Love & light,

    Solomon.

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