This is not likely to happen - although there is currently lots of theoretical research on the topic.
Not currently. Perhaps not ever.
No, time travel isn't possible.
You can't, time-travel isn't possible.
Time travel isn't possible.
both can be possible in theory
yes because if time travel is theoretically possible and you were able to return to your hometown in the past you would be there as you are now and as you were in the past
It probably isn't possible to travel faster than light - whether we want to travel in time, or not.
Actually there is NO known way to change the past, since time-travel - or any other way to change the past - has so far not been confirmed to be possible at all.
So far, time travel has not been achieved - not with a watch, not with any other device. It seems somewhat doubtful that it ever will be possible.
There has been speculation about the possibility of time travel for centuries, but there is no evidence that this is possible, or ever will be.Of course, you are traveling forward in time, all the time.
According to current scientific understanding, time travel to the past is not possible due to paradoxes such as the grandfather paradox. Additionally, the concept of time travel to the future is theoretically possible through time dilation as predicted by Einstein's theory of relativity. As for why no one from the future has come back, it may be due to the practical limitations and complexities involved in achieving time travel, or perhaps it is simply not feasible in the way commonly depicted in science fiction.
There is no evidence that time travel ever occurred (outside science fiction and fantasy stories, of course), and perhaps it will never be possible. Therefore, it's a bit premature to ask about the "cause" of time travel. If there is no time travel, then there is nothing that causes it.