Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
Your thumb is about the same size as your nose.
124
Only humans shed emotional tears.
331
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
The human eye blinks an average of 4,200,000 times a year.
233
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
A man's beard grows fastest when he anticipates sex.
239