There are more bacteria in your mouth than there are people in the world.
60
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Bearing a male child can alter a woman's brain by leaving male DNA that can persist for the rest of her life, making her less likely to suffer from Alzheimer's disease, promote tissue repair, and improve her immune system.
16
The average sperm cell swims at 8 inches per hour.
76