* Human bones are four times stronger than concrete
* The body produces during life enough to fill two swimming pools
* Stomach contains strong acids capable of dissolving zinc
* Nose that can distinguish and remember the nearly 50,000 different scents
* The body produces enough energy to boil a gallon of water during the 30-minute
* The human body has 45 miles of nerves
* We have more than half of the bones in the hands and feet
* The human body contains enough carbon to make 1000 a pencil
* Blood is pumped about 2,000 gallons of blood a day
* Speed up sneeze Human Machine 100 mph
