Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
Although men ARE more likely to suffer heart attacks, women are more likely to die within a year from having a heart attack.
50
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
It is possible to go blind from smoking too heavily.
50
One out of 20 people have an extra rib.
66
By weight, Bone is five times stronger than steel.
417
The largest cell in the human body is the female egg and the smallest is the male sperm.
682