The world's shortest man measures only 21.5 inches.
73
By weight, Bone is five times stronger than steel.
417
On average, there's 100 billion neurons in the human brain.
83
The human brain doesn't stop developing until about 25 years old.
102
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The human brain is more active during sleep than during the day.
28
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
One human hair can support 3 ounces.
191