Dimensions...I have no idea....
But as far as time travel, wasn't it Einstein that ran the test with the train, mirror, poles and electricity? The Theory of Relativity? Time is relative.
He basically proved that the faster you go, time slows down, and he suggests that if you hit a certain speed (speed of light?) time will stop. If you go faster than that speed you will actually start going backwards in time.
I guess that is one of the reasons astronauts who have been in space actually live .5 seconds or whatever 'earlier' than everyone else. More easily understood, I guess it just means it made them younger.
So technically, we could go back to being children if we went fast enough. BUT, everyone else would still be stuck in 'real time'. When we 'returned', would it be just US who have gotten younger? Or would the entire planet reverted back in time too? Wouldn't the entire world have to move that fast though?
If there is a hint of
real time travel here, I guess it would be impossible to move forwards in time though....you'd have to stand still? hahaha
BUT...never say never....
I agree with Heather, there is so much more out there than my logical mind can see. If you were a bird, would you be able to comprehend cars? Computers? Nope. But they do exist.