Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The human brain doesn't stop developing until about 25 years old.
102
It takes about 20 seconds for a red blood cell to circle the whole body.
102
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The average person will go on a date at least 100 times before they finally marry.
33
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161