If an atom were the size of the Thomas and Mack Center, the nucleus would
be the size of a grain of salt and the electrons would be the size
of dust specks flying around the nucleus where the walls are !! Thus,
we are composed of almost 100% empty space !! Since there is so much empty
space and the subatomic "particles" are really just probability
or standing waves, not solid matter, why can't we just walk through walls
or doors ?