I CURRENTLY BELIEVE that what we call "reality" is quite possibly an unfathomable mystery having to do with consciousness that gives the impression an illusion is solidly real.
Quantum physicists are currently saying that atoms are made of mostly empty space and that there is nothing solid about an atom. Electrons and protons are pockets of energy that 'pop' in and out of this existence. Where do they go when they 'pop' out of this existence? Supposedly, that is anyone's guess.
Until we understand how consciousness collapses some sort of 'wave form function' to create the moment-by-moment reality we experience we should NOT be too certain about ANY scientific theory; for that precious scientific THEORY may eventually be thrown into the proverbial trash along with the Piltdown Man.