If time travel to the past was possible then somebody would have done it. Though, it is known to be impossible now but if 20,000 years in the future somebody figures out how to do it, then our current now would already be altered.
Traveling to the future in the sense of faster then 1 second at a time is indeed possible.
Because it is impossible to go faster then the speed of light, once your velocity approaches it, time in for you would slow down.
yes but nothing is definite.... some how or some day we can
think about it... spacecraft is impossible back hundreds years ago.. people wont even think about it ..
long time ago.. people would think that travel faster than sound is impossible
but they all came possible
so dont be too precise