Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
A human being loses an average of 40 to 100 strands of hair a day.
133
The human brain uses approximately as much energy as a 10 watt light bulb.
120
The human body contains over a billion miles of DNA.
147
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.
21
You see your nose at all times, your brain just chooses to ignore it.
30
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13