Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
The human brain doesn't stop developing until about 25 years old.
102
In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The average sperm cell swims at 8 inches per hour.
76