If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
Your skin is actually an organ.
88
About 400 different kinds of microbes live on and in the human body.
-3
The aorta, the largest artery in the body, is almost the diameter of a garden hose.
37
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Chocolate, sex, and laughter are all important for a healthy brain.
37
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
Panophobia is the fear of everything.
52