If you removed the empty space from every atom in all 8 billion humans, the entire population would fit inside a single sugar cube.

The structure of an atom is defined by a tiny, dense nucleus surrounded by a vast cloud of electrons. According to research by physicists like Ernest Rutherford, who discovered the nucleus in 1911, the nucleus occupies only about one-trillionth of the atom's total volume. The rest is essentially empty space where electrons exist in various energy levels.To visualize this scale, if an atom were expanded to the size of a professional football stadium, the nucleus would be the size of a small marble placed at the 50-yard line. The electrons would be like tiny gnats buzzing around the very top rows of the stands. Everything between that marble and those gnats is completely empty vacuum.If we could theoretically remove this space from the roughly 7 octillion atoms in the human body, we would be left with only the nuclei and electrons. For the global population of 8 billion people, this concentrated matter would take up the volume of a sugar cube, which is roughly one cubic centimeter. However, mass is conserved during this compression.Because the nuclei contain nearly all the mass of an atom, this sugar cube would be extraordinarily heavy. It would have a density comparable to a neutron star, which is about 100 million tons per cubic centimeter. Consequently, that tiny cube would weigh approximately 5 billion tons, roughly the same as the combined weight of all the buildings in the world.