i don't know in which section it belongs, so i am putting it here........ according to various theories proposed by various researchers, time travel depends on the speed of light. as far as i have read/heard - i) anything traveling faster than the speed of light moves back in time. ii) anything traveling AT the speed of light remains stationary in time. now my question- if light is traveling at the speed of light (obviously), then why does it take time to travel????? it (light beam/ray etc) should be stationary in time and should reach the destination the moment it leaves the light source.