Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The average sperm cell swims at 8 inches per hour.
76
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24