Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
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
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The human brain is more active during sleep than during the day.
28
It takes about 20 seconds for a red blood cell to circle the whole body.
102