It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Obsessive nose picking is called Rhinotillexomania.
101
It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
218
If the human eye was a digital camera, it would have 576 megapixels.
25
It takes about 20 seconds for a red blood cell to circle the whole body.
102
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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