It takes about 20 seconds for a red blood cell to circle the whole body.
102
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
Every human spent about half an hour as a single cell.
144
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The human sigh acts as a physiological reset button.
23