Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
7
Awarding people money for doing well in IQ tests causes them to score better, $10 increased people's score by an average of more than 20 IQ points. IQ tests don’t just measure intelligence - they also measure effort.
9
Males sweat 40% more than females.
104
Roughly a quarter of the world's people live in China.
50
A man named Charles Osborne had the hiccups for approximately sixty-nine years.
79
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Intelligent people have more zinc and copper in their hair.
233
Senegalese women spend an average of 17.5 hours a week just collecting water.
27