All the matter that makes up the human race could fit in a sugar cube.

All the matter that makes up the human race could fit in a sugar cube

Atoms are 99.9999999999999 per cent empty space.

If you forced all the atoms together, removing the space between them, crushing them down so the all those vast empty cathedrals were compressed into the first-sized nuclei, a single teaspoon or sugar cube of the resulting mass would weigh five billion tons; about ten times the weight of all the humans who are currently alive.

Incidentally, that is exactly what has happened in a neutron star, the super-dense mass left over after a certain kind of supernova.

Source:-  http://www.telegraph.co.uk/news/science/6546462/The-10-weirdest-physics-facts-from-relativity-to-quantum-physics.html