I heard that if all the empty space was removed from the universe then the matter left would be the size of a sugar cube?

Does that mean we live in a holographic universe?

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Xuan12 · 31-35, M

I don't know if it would be quite the same size as a sugar cube, I'm thinking it would be bigger, but the general idea is true. There are vast amounts of seemingly empty space and if you crammed all known matter into as tight a space as possible it would be surprisingly small.