Practicing Gratitude for the Marvels of the Body

Returning after a long time to your childhood home, you may find your bedroom pretty much unchanged, though someone else may live there now. In contrast, the body in which you live is constantly changing. As you know, over a space of seven years your body replaces practically every single molecule with a new one. But did you know that every morning, the first time you open your eyes, the top layer of your vision-sensor receptors is simply scorched away, and you literally see the world with new eyes? And still more amazingly, that two million of your red blood cells die every single second; and two million new ones take their place? You can learn fascinating facts like these through the games on this BBC interactive body page.