A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The world's shortest man measures only 21.5 inches.
73
Only humans shed emotional tears.
331
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
It takes approximately 12 hours for food to entirely digest.
93
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Tigers can see 6 times better at night than humans.
305