The human eye blinks an average of 4,200,000 times a year.
233
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
The human brain doesn't stop developing until about 25 years old.
102
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
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
Babies crawl an average of 200m a day.
212
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11