Human teeth are almost as hard as rocks!
47
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
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
Medical research has found substances in mistletoe that can slow down tumor growth.
32
Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
The average human body contains enough fat to make seven bars of soap.
45
The human brain uses approximately as much energy as a 10 watt light bulb.
120