Pain occurs when sounds are above 130 db.
124
The human body contains over a billion miles of DNA.
147
One quarter of the human brain is used to control the eyes.
43
Human thigh bones are stronger than concrete!
63
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
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 brain can stay alive for 4 to 6 minutes without oxygen. After that cells begin die.
193
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13