[Angrist]

That 10th dimention video was interesting, but I still don't see time as a dimension.

I can believe in a 4th dimension, but it has to be something we don't know. Not something we already know, but always moves at the same pace in the same direction.

Let's say we lived in the 2nd dimension. Would we be able to see the 3rd dimension, while we couldn't change it or move through it? No, we wouldn't be aware of the 3rd dimension.
Which reminds me, time would also exist in a 2D or 1D world. They'd think that time was the 3rd or 2nd dimension. We'd laugh at them.

I've read about the theories. About the time-space continuum. It's why you can't throw a ball fast and in an arch. Or through it slow and in a straight line. Fun theory, but there are much more plausible alternatives.

I've been wanting to read Einstein's relativity theory. Haven't gotten around to it. Sure sounds interesting, but it still wouldn't prove that you can go back in time.