If everything in the universe doubled in size linearly, would you notice?
Some people say you would, since surface area only increases by 4
times, while volume (and thus presumably mass and further presumably
weight) increases by 8 times. Thus, all surfaces would be supporting
relatively twice as much mass as before (8 divided by 4).
They’re wrong, of course. If *everything* doubled in size, that would
include atoms and even sub-atomic particles. This would require
fundamental changes in the physical laws of the universe, so it’s not
at all clear that surfaces would be supporting twice as much weight.