any answer to this, page-8

I'm still having severe problems with gravity.

So mass warps space. In what dimension(s)? The (two-dimesional) picture of a massive object acting like a steel ball on a rubber sheet is pretty, but it implies a third dimension into which the space is stretched - go back up to our space, and we need at least one more spacial dimension.

And if mass warps space "downwards" in that dimension, surely it can be warped upwards?

Antigravity, here we come!