Does 'empty' space consist of 'stuff' which is displaced by matter?
Is 'empty' space filled with massive particles which are displaced by the particles of matter which exist in it and move through it?
If an atom is mostly empty space, why does matter seem so solid? Given that the reality of the molecular state of all matter is mostly empty space, why does matter feel solid? What is the space between subatomic particles considered to be? What are matter waves associated with particles? Could we shrink things by reducing the 'empty space' in subatomic particles? How could a particle with a known mass go through a solid wall? Do virtual particles in vacuum really exist? Where is dust among the three states of matter? What is empty space made up of? What is empty space made of? Do virtual particles and energy in vacuum really exist? Can we observe them? Where? When? What is condensed matter physics? What research area does it cover? What is condensed matter physics and why is it important? What is the difference between a weightless particle and a particle which has mass? Are we really alive due to the fact that we are made of empty space? Why are there so many subatomic particles? What is the intensive property of matter? What are some common examples of solid matter? Do elementary particles have shape? How much space is between particles? What is this space made of? Vacuumed sucked space is considered nothing. Is nothing considered to be present when nothing exists? Or was it considerd to be expanded empty space? Does an object moving in a vacuum lose mass? Is de Broglie's subquantic medium the strongly interacting dark matter which fills 'empty' space? Is it the DM that waves in a double slit experiment? Is there evidence of the strongly interacting dark matter that fills 'empty' space every time a double slit experiment is performed? Is it what waves? How is it possible for the center of a black hole to be infinitely dense, that is, a huge amount of mass occupying zero volume? What are the most common examples of solid matter? Can we possibly have particles with negative mass? Is there any particle that interacts with matter but able to go through an entire planet? Like a photon or a neutrino? If most of the space in an atom is empty,  then why do things collide instead of just passing through each other? Are vacuum fluctuations energy in vacuum? Are these virtual particles? How do we know there's this energy if they didn't exist? Do they really exist?