It takes about 20 seconds for a red blood cell to circle the whole body.
102
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
A fetus develops fingerprints at eighteen weeks!
32
Dieters who sleep more take off more fat that those who sleep less.
159
The aorta, the largest artery in the body, is almost the diameter of a garden hose.
37
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
The skin on your lips is 200 times more sensitive than your fingertips.
345
If you are bitten by a poisonous snake, and fail to receive medical attention, you still have a 50% chance of survival.
28