Did you know that an adult human heart pumps about 6,000-7,500 liters (1,500-2,000 gallons) of blood daily? Did you know that the epidermis or surface layer of the skin is renewed every two to four weeks? Did you know that the human eye can distinguish about 10 million different colors? Did you know that your body produces 25 million new cells each second? I bet you didn't know that. Neither did I. We take for granted how fascinating and amazing the human body can be, yet we don't realize that we are a living, breathing miracle.