It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
You forget 90% of your dreams.
256
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
It takes approximately 12 hours for food to entirely digest.
93
Gorillas can catch human colds and other illnesses.
205
It takes about 20 seconds for a red blood cell to circle the whole body.
102
On average, there's 100 billion neurons in the human brain.
83
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24