If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
Kissing an infection-free partner is good for your teeth!
141
The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
130
Gardening is said to be one of the best exercises for maintaining healthy bones.
40
Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
When your face blushes, the lining of your stomach turns red, too.
154
People that suffer from gum disease are twice as likely to have a stroke or heart attack.
22