Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Your thumb is about the same size as your nose.
124
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Only humans shed emotional tears.
331
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
The human sigh acts as a physiological reset button.
23
If the human eye was a digital camera, it would have 576 megapixels.
25