Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
Tigers can see 6 times better at night than humans.
305
If the human eye was a digital camera, it would have 576 megapixels.
25
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
In one day, adult lungs move about 10,000 litres of air.
11
Babies crawl an average of 200m a day.
212