The human brain doesn't stop developing until about 25 years old.
102
Only humans shed emotional tears.
331
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
The human eye blinks an average of 4,200,000 times a year.
233
In one day, adult lungs move about 10,000 litres of air.
11
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The human sigh acts as a physiological reset button.
23