Only 2% of the Earth's population are natural redheads.
13
Males sweat 40% more than females.
104
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Babies that are breastfed are more likely to be slimmer as adults than those that are not breastfed.
110
The average person walks the equivalent of twice around the world in a lifetime
69
Intelligent people have more zinc and copper in their hair.
233