Well folks, if you ever wanted to go back in time to prevent buying Final Fantasy: Crystal Chronicles at EB Games back then, you are out of luck. At least that's the claims of Hong Kong physicists at the University of Science and Technology research team led by Du Shengwang. They have proved that a single photon obeys Einstein's theory, which says that nothing can travel faster than the speed of light. If that is true, then the idea of traveling faster than light to achieve time traveling using a series of tubes might be impossible.
If you want to find out more of this topic, you can visit this link.