I have been doing some studying on little world we think we live in. This may be a bid hard to wrap your mind around but it makes perfect sense. If you were to remove all "void space" from the entire Empire States building... how big would the clump of mass be?
Two answer this you must have an understand that every atom from Led to Carbon are made of Atom that are made mostly of empty space. Atoms are hollow and only have a very very small nucleus, electron(s) + proton(s) in different arrangements creating mathematical formulas creating each element.
If you remove all empty space from the Empire States building... the size of the mass would be?
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The size of a grain of sand weighing the same as the entire building as it stands now.