Question: is time travel possible

Kate Salmon answered on 17 Mar 2014:

@beastboy- sorry at the moment it is not possible! But Professor Brian Cox feels that it would be possible to travel to the future but not into the past. This is because of Einstein’s theory of relativity; Imagine you boarded a spaceship that travels at the speed of light- time for you actually gets stretched meaning those that were not travelling at the speed of light back on earth would actually age a lot faster relative to you. This means that when you returned to earth then although it might feel like you have only been gone a year, because you have been travelling at the speed of light, actually thousands of years could have passed. So to travel through time into the future at the moment, we would need a very fast spaceship!