Your thumb is about the same size as your nose.
124
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
35
You can't tickle yourself.
29
One human hair can support 3 ounces.
191
The average person's skin weighs twice as much as their brain.
131
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
94
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The human body contains over a billion miles of DNA.
147