The human brain is more active during sleep than during the day.
28
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
The tongue is the strongest muscle in the human body.
50
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realizes it's there, though!
25
Fingernails grow nearly 4 times faster than toenails.
31
The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
130

