When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The human heart creates enough pressure to squirt blood 30 ft.
37
Your stomach produces a new layer of mucus every two weeks so that it doesn't digest itself.
160
India used to be the richest country in the world until the British invasion in the early 17th Century.
37
The average human body contains enough iron to make a small nail.
50
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
According to a 1950s survey, 75% of men ejaculate within two minutes of penetration.
109