Astra.Xtreme, on 04 January 2013 - 14:14, said:
Nothing really new since this is just the basic principle of relativity. The faster you go, the more time accelerates.
I believe it's something on the lines of if you travel at the speed of light for one year, 7 years here on Earth would elapse.
So technically that would be time traveling forward with respect to Earth. The key part is the time dilation.
Traveling backwards in time, on the other hand, is physically impossible.
I agree with the first part, there's nothing particularly new in this article as we've known about the theory of relativity for a long time, and with it we've known and tested the time dilation effect.
However, the article points out that there is a possibility of traveling back in time by using wormholes. The only problem is that we can only speculate about the idea, which is as good as saying, "it's not yet possible." Even if wormholes were
a portal for time traveling to the past, we've got no way to manipulate it so that it would send us back to a specific time. We'd just have to accept where the wormhole's end point in time is.
nik louch, on 04 January 2013 - 14:22, said:
I know very little on this, so bear with me...
What you say is the faster you travel, the faster time passes?
So the slower you travel the slower is passes? But that's not true, surely?
No. The theory of relativity states that the closer you get to the speed of light, the slower time passes for you. As the article points out, if you were on a train that got to 99% of the speed of light, you would perceive time as passing at a normal rate, but what is happening is that the time is passing slower on the train than it is for the people at the train station.