Is Time Travel Possible?
- 31 Oct 2006Not all scientists agree but according to Einstein and quantum theory, time travel could be possible.
 Is time travel possible? According to Einstein and quantum theory it could be. |
Imagine sitting by the Statue of Liberty and watching dinosaurs play in Manhattan or walking on the headland round Botany Bay as Captain Cook arrives to claim the new land for King George and England. Would you keep quiet at the slave markets of Savannah or save Martin Luther King from the assassin's bullet? Time travel is everywhere in the media from Star Trek to Dr Who but what can science tell us about it? Is time travel possible?
Actually, time travel is happening all around us. Hold out your hand and every second a dozen or so tiny nuclear particles called cosmic ray muons will pass straight through you. These particles are too small to feel and sometimes do damage which your body repairs. Astronauts in space can die from too much cosmic ray damage which causes radiation sickness.
Cosmic ray muons are the debris from collisions high in the atmosphere. Stable nuclear particles from the sun and the stars collide with the atmosphere 20 km above the Earth. Traveling at the speed of light, about 300,000 kilometers per second, it should take these muons around seven millionths of a second to reach a person on Earth. The only problem is that muons only live for two millionths of a second and so should never reach someone standing on the ground. But Einstein's special theory of relativity claims that the muons travel through time to get to reach us.
Time is relative
According to Einstein's special theory of relativity, our lives pass more slowly if we travel close to the speed of light. He has also shown that we live longer if we go and live in an intense gravitational field. Einstein has thus opened up the future and shown that it is possible to slow down time for ourselves, leave the Earth and come back to meet our grandchildren or our great-grandchildren. But he has not shown that it is possible to come back! Physicist Steven Hawking has suggested that it is not possible to go back in time because you could kill your own grandmother before your mother or father were born and so make it impossible for you to be born.
But could it still be possible? It is impossible with our normal model of the world but some scientists have suggested that we inhabit a universe in which there are an infinite number of parallel worlds. So if you go back to the past and kill your grandmother, then you set off another parallel world in which you are not part of the future.
Others have suggested that if time travel into the past is possible then there will be time tourists around from the future visiting us in their past. No one has been known to have met such tourists. But that is not the whole story. There are lots of things that we do not understand that hint that time travel Star Trek fashion around the universe might be possible.
Posted by: guest - 2009-05-20 - 09:50 GMT
If time travel works then too many people would most likely die from it
Posted by: guest - 2009-05-20 - 09:44 GMT
Can I come?
Posted by: guest - 2009-05-20 - 09:44 GMT
This truly is a facinating topic
Posted by: guest - 2009-05-20 - 09:42 GMT
I think time travel would ruin the human experience. God gave the gift of choice, and time travel would make all choices null and void. I don't think we will ever achieve this feat for a good reason!
Posted by: miles - 2009-05-20 - 09:39 GMT
I have always been interested in time travel and have had numerous dreams about going back in time. I really intend to research this subject in very much detail and try to find a way to invent a device to make this possible. Help concerning this matter will be appreciated
Posted by: guest - 2009-05-20 - 09:35 GMT
From the Islamic point of view, time passing cannot be repeated. That's why in the Quran, one of the verses did mention something like this...Oh thy time, all humans are in the losing unless he does good deeds and spreads good human relationships.
Posted by: guest - 2009-05-20 - 09:31 GMT
If we were to travel back in time, it would mean that our slightest actions would ultimately affect our "future," or present time. Would this terminate or change our present existence? Perhaps other dimensions of reality may come into play.
Posted by: guest - 2009-04-27 - 13:11 GMT
If we do go into the future how do we know Earth as it exists today will even be there? We don't. We travel forward in time then just be dropped off into nowhere. Even if we are thinking about time travel we also have to think about the extreme danger: when you time travel you're messing with the whole threads of the universe. We could ruin humanity by time traveling or even the whole entire universe.
Posted by: mikuproductions - 2009-04-27 - 13:04 GMT
Well I think time travel is important and cool. We could learn a lot from it.
Posted by: guest - 2009-04-27 - 13:03 GMT
I think we will not make a paradox if you go to the past and kill your dad. You only change 2 timelines: first, the one which you came from which will go on without you; and the timeline you kill your dad that you were never born in.
Posted by: k22 - 2009-04-27 - 12:56 GMT
If we went back and killed one of our ancestors, it would mean we had never existed; which means that we would never have killed our relative. Would this not create a paradox?
I imagine it shorting out the Universe, as it flicked back and forth between you existing and not existing due to your actions before finally shutting off.. forever.
Posted by: guest - 2009-03-16 - 11:08 GMT
Well when I think of time travel I think of the people most important in a time period, and would give them some warning of their death. And if things should go wrong then I would go back and stop myself
Posted by: KLS - 2009-03-12 - 21:49 GMT
Couldn't get any more messed up than it already is :p
Posted by: guest - 2009-03-12 - 12:20 GMT
We can view the past, but not interfere with it, I believe. When we look at other planets or stars million of light years away we see what happened million of years ago
Posted by: guest - 2009-03-12 - 12:15 GMT
It would be a mistake if you could make time travel possible. It would ruin the Earth completely. Not even worth it.
Posted by: guest - 2009-03-12 - 10:54 GMT
I think it's not even possible, but if someone traveled back he will most need to change the time here and there in the Universe.
Posted by: guest - 2009-02-17 - 12:15 GMT
Going back in time would be stupid; even touching something would mess things up. Why would someone even want to chance something like that?
Posted by: guest - 2009-02-17 - 12:11 GMT
Going back to the past and even touching something might change something here in the future and mess a lot of stuff up.
Posted by: guest - 2009-01-30 - 17:46 GMT
Time travel would be cool because you could go back and fix past events and may be even stop loved ones from dying. If you were to fix past events you would mess up the space-time continuum so in short I think time travel is possible
Posted by: guest - 2009-01-16 - 11:22 GMT
I don't think time travel is possible, it just can't, because then somebody from the thousands of years Earth has to live would have come and met one of us in recorded history.
and I don't think God made the Universe to be able to go back in time
Posted by: guest - 2009-01-12 - 10:59 GMT
Time travel could be helpful under certain circumstances, but most of the time it would just cause problems by messing up the present.
Posted by: guest - 2009-01-06 - 16:53 GMT
I believe that time travel might ruin us, but it will be completely worth it as well. So I say let's do it.
Posted by: guest - 2008-12-21 - 15:23 GMT
Let's do it...
Posted by: guest - 2008-12-13 - 15:56 GMT
Wow it would be great if we could go back in time and explore, but with certain limitations so that we don't alter our present. I think we are not ready for such technology though.
Posted by: guest - 2008-11-22 - 16:33 GMT
Please I want to go back in time and do something for the Universe, so I request the scientists to invent the time machine.........
Posted by: guest - 2008-11-04 - 17:22 GMT
Humans are not at all ready to go to the past, but somehow if you could make time travel more like a virtual video game it just might work. Truthfully, I wouldn't want anyone to go to the past for real. It's called the butterfly effect: you step on a butterfly in the past and destroy the whole world. I wouldnt' really mind if someone went into the future, though, because it's impossible to change the future except in the present.
Posted by: guest - 2008-10-21 - 11:20 GMT
I agree that humans are simply not ready for it. It would plunge our entire planet into total chaos and darkness.
Posted by: guest - 2008-10-07 - 11:07 GMT
Humans are not yet ready for time travel. It can be done, but not with our planet's technology beside humans would misuse time travel, and people could change the Universe and destroy eveything. Humans are not ready yet................
Posted by: guest - 2008-10-03 - 11:38 GMT
If time travel is possible, it's a bad idea if someone does it.
Posted by: guest - 2008-09-22 - 10:21 GMT
The best!
Posted by: guest - 2008-09-08 - 14:48 GMT
Please send me articles on time travel on chetadam@rediffmail.com.
I think time travel is possible.We always talk of time travel in relation to us making changes in the past and the future.I think, time travel in the past or the future, will not allow any alterations, as that would spurn into a series of changes.
Write back, I guess we can share some thoughts..........
Posted by: Chetan - 2008-08-13 - 10:48 GMT
I want to know about time travel. Send all the info on. sahil_saini@ymail.com thanks
Posted by: sahilsaini - 2008-08-08 - 11:19 GMT
Time travel is possible
Posted by: guest - 2008-08-05 - 12:09 GMT
This article is very fascinating but this one is better explained at
http://www.pbs.org/wnet/hawking/mysteries/html/bioUnskaku1-1.html
I believe time travel may have been performed before but whoever did it possibly could not make it back to tell us that it was successful. Hence referring to the article in the pbs link that states it may not be possible to return but it may be possible to travel. Or maybe that point was in this article? Anyhow all I was trying to get by was my opinion that it may have already been performed but we were not able to receive the answer. Who knows? Maybe Einstein had traveled in time and decided it was not worth it for humans who were so destructive and curious to wield such information? Maybe he decided it was best for him to just lay out the foundations? Maybe he had witnessed the future and had gained extraordinary knowledge for his current time of existence? Who knows? There are many quotes from Einstein that show superior understanding and knowledge of consequences to certain happenings.
Posted by: hab - 2008-07-21 - 17:10 GMT
i want to learn about time travel because i saw this movie called minute men its all abut time travel and a black hole cause of traveling a lot is that true please write back kate rocha
Posted by: guest - 2008-06-25 - 17:29 GMT
Do you really want to know? ;)))
Posted by: guest - 2007-11-07 - 15:36 GMT
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