2006-12-25 15:11:33 · 16 answers · asked by rubbersoul 1 in Science & Mathematics ➔ Astronomy & Space
it was posed that "If, in the future, we invent a time machine and travel into the past, the time-travelers would be among us now" Well how do we know they aren't.
I am somewhat of a skeptic but...
If it takes us a few million years to develop time travel, would human beings still look the same? Most likely not. How do we know that these sightings we call 'aliens' or extraterrestrials are actually us in a few million years.
Just a thought, but not necessarily what I believe.
2006-12-25 18:59:27 · answer #1 · answered by xtpy792000 2 · 0⤊ 0⤋
Stephen Hawking proposed the idea of chronology protection to prevent the sort of paradoxes that arise if time travel is possible. Li-Xin Li has proposed anti-chronology protection as a counter argument.
It seems that in 1998 IBM was able to successful transfer a set of molecules from one area of a room to another in one second. The experiment was to find out if teleportation was possible. In the first two tries it didn't seem to work, but then on the third try it did. Now figure that they were moving molecules ... a whole item the size of a sugar cube would take 1,000 supercomputers to track and re-assemble all the molecules in that sugar cube.
It may or may not happen in furutre.in our time time machine is beyond the light.
2006-12-25 15:48:39 · answer #2 · answered by rajeevan 1 · 0⤊ 0⤋
Even with all the limitations we know are inherant in the concept of time travel, there is certainly the possibility of someone in the far distant future coming up with a means to do it.
It doesn't look like in this century we will get that thrill, but who knows...the future people might come to visit and they might be the way the technology is provided.
This sounds like a lot of hogwash, but 50 years ago nobody could foresee the things we have today. And we all take for granted, now.
2006-12-25 15:58:18 · answer #3 · answered by Gnome 6 · 0⤊ 0⤋
If a time machine can be invented, then you can assume that it WILL be invented, which means that in the future, people will be time-traveling, which means that some people from the future must be with us right now. Unless they are really sneaky, I would say it is impossible.
2006-12-25 15:15:14 · answer #4 · answered by FoodLOVER 2 · 0⤊ 0⤋
Highly unlikely if for no other reason but this: The earth turns on its axis, it revolves around the sun, the entire solar system travels through the galaxy, the entire galaxy is moving through inter-stellar universe. So you, the earth, the moon and the stars have never remained in one place ever. Now if you try to travel backwards in time how do you locate where you were? And even
though with incredible calculations you may be able to do this, the earth wouldn't be there anymore. You can't seperate time and distance.
2006-12-25 15:49:20 · answer #5 · answered by Anonymous · 0⤊ 0⤋
I've seen what appears to be some convincing evidence.But I personally feel that true time travel is something of a spiritual nature than a physical one.Why waste all that energy and time packing etc. when it can be done in a couple of hours or less without leaving the house.
2006-12-25 15:49:32 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Yes, one aspect of time travel is theoretically possible. That is to say, according to Einstein's Special theory of relativity it is possible to travel into the future. How far in the future in a given time span depends how close to the speed of light you accelerate. Traveling at 80% of the speed of light according to Einstein's formula y=1/ Sqrt 1-v^2/c^2 ,(v=velocity, c= speed of light) the clocks on Earth will advance 1.667 times faster than the one traveling in space. Therefore, after a twenty year journey by the space travelers, (20 yrs time has elapsed by the travelers account) upon their return, there will have passed on earth 33.4 years.
At 98% of the speed of light, 20 years of travel at this speed, upon return, 100.4 years will have passed on earth.
This is the equivalent to traveling into the future, which is a form of time travel. Therefore time travel is theoretically possible. In fact, check out this site as the guy proclaims that we will be able to approach speed of light travel within 100 yrs.
http://www.physorg.com/news10789.html
Traveling back in time is debatable, as you would have to be able to exceed the speed of light to do that.
Plug in the numbers to this formula. speed of light c= 186,000 miles per second. For velocity, just multiply this number from .01 to .9999. Then just follow mathematical operations.
good luck
2006-12-25 19:49:44 · answer #7 · answered by James O only logical answer D 4 · 0⤊ 0⤋
There is not one.
What about a "dimension jump" machine, a jet to travel between parallell dimensions!
Reply.
2006-12-25 17:05:14 · answer #8 · answered by Anonymous · 0⤊ 0⤋
There are things in nature man will never be allowed to tamper with. Time and death!
2006-12-25 17:09:45 · answer #9 · answered by Manny L 3 · 0⤊ 0⤋
Think about it, time was really created by man, so no.
2006-12-25 15:19:24 · answer #10 · answered by Jason F 2 · 0⤊ 0⤋