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
Fingernails grow fastest on the hand you favor.
44
Drinking watermelon juice before a workout helps reduce muscle soreness.
21
If you are bitten by a poisonous snake, and fail to receive medical attention, you still have a 50% chance of survival.
28
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
The human sigh acts as a physiological reset button.
23
Your heart pumps about 2,000 gallons of blood each day!
53
Crushed cockroaches can be applied to a stinging wound to help relieve the pain.
31