On average, there's 100 billion neurons in the human brain.
83
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The human sigh acts as a physiological reset button.
23
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The human brain has the capacity to store everything that you experience.
4k
Tigers can see 6 times better at night than humans.
305
One human hair can support 3 ounces.
191