Fun Facts


You may not realize it, but you are a towering skyscraper, a cooperative apartment building of 30 trillion units, or cells.  You are composed of about a hundred times more cells than there are stars in the Milky Way.


Each of your cells is made of over a hundred trillion atoms. A stack of that many dollar bills would reach to the Moon and back over 25 times.


You replace 98 percent of your atoms every year. That makes you less like a thing and more like a process—like a flame whose atoms are constantly being replaced. While you’ll die, your atoms won’t. They’ll continue revolving through life, soil, oceans, and sky in a chemical merry-go-round.