Why Don’t We Have Artificial Gravity In Space?
Ethan Siegel

What physics would even allow for electrically inverted matter to rush out of warped space time instead of into it? What would that even be like, based on our current understanding of relativity? I suppose if you’ve got your standard 2d projection of space time with gravity being wells going “down” in the 3rd dimension, antigravity would be mountains going “up”?