The human brain uses approximately as much energy as a 10 watt light bulb.
120
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
Within three days of death, the enzymes that once digested your food begin to eat you.
22
One human hair can support 3 ounces.
191
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89