Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
Your stomach produces a new layer of mucus every two weeks so that it doesn't digest itself.
160
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9
The average person's skin weighs twice as much as their brain.
131
Scientists estimate that laughing 100 times is equivalent to a 10-minute workout on a rowing machine.
202
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
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
A woman's sense of smell is most sensitive during ovulation.
34