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
Every cigarette smoked cuts at least five minutes of life on average, which is roughly the time it takes to smoke one cigarette.
118
The smallest human penis ever recorded was just 5/8 of an inch long!
77
In the average lifetime a person will breath in about 44 pounds of dust.
21
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
Flu shots only work about 70% of the time.
18
On average, women have always lived longer than men.
195
