No surprise to me I’m mostly empty space.
“… if an atom were the size of Fenway Park, the home stadium of the Red Sox in Boston, its dense central nucleus would be the size of a mustard seed, with the electrons gracefully orbiting in the outer bleachers. In fact, almost the entire volume of an atom, considerably more than 99 percent, is empty space, except for the haze of nearly weightless electrons. Since we and everything else are made of atoms, we are mostly empty space.”
Alan Lightman, here. Complimented by the completely genius Natalie Wolchover’s article Why the Tiny Weight of Empty Space Is Such a Huge Mystery.