1) Your body gives off enough heat in 30 minutes to bring half a gallon of water to boil;
2) You use 200 muscles to take one step;
3) In a lifetime, the heart pumps about one million barrels of blood;
4) Women blink twice as often as men;
5) Your pupils dilate the same when looking at someone you love or hate.
(Published January 2, 2015)