Why does time stop at the speed of light?

So, if I were to travel in a spacecraft at the speed of light, would I freeze and stop moving? From the perspective of a stationary observer if your spacecraft was traveling at close to the speed of light, time on the spacecraft would have slowed down (would be approaching zero or frozen). read more

When traveling with the speed of light time does not"exist". Well sort of. If a body is traveling with the speed of light its origin and destination are one and the same. read more

If you observe a space time graph, with x being space and y being time, traveling at speed of light is usually deduced as a 45deg angle (considering equal proportions, 1 unit y of 1 year and 1 unit x of 1 light year). read more

As for going back in time, exceeding the speed of light. If you have a time machine, you need to be able to lock up the time period you left from causality effects, effecting it. Imagine if the time machine you had could move things from the past, from the future. Move a quark out of place in an atom in a grain of sand, on a beach 1000 years ago. read more