The average person's skin weighs twice as much as their brain.
131
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The human brain uses approximately as much energy as a 10 watt light bulb.
120
The average sperm cell swims at 8 inches per hour.
76
When you take a step, you are using up to 200 muscles.
886
One human hair can support 3 ounces.
191
The human brain doesn't stop developing until about 25 years old.
102