" However, it turns out there are more atoms in a single mouthful of air than there are mouthfuls of air in the earth’s atmosphere. It thus follows that every breath you take contains atoms breathed out by Marilyn Monroe. Or Julius Caesar. Or the last Tyrannosaurus rex ever to have walked the earth. "

― Marcus Chown , Infinity in the Palm of Your Hand: Fifty Wonders That Reveal an Extraordinary Universe