Only humans shed emotional tears.
331
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
It takes approximately 12 hours for food to entirely digest.
93
We share 70% of our DNA with a slug.
218
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Obsessive nose picking is called Rhinotillexomania.
101