People with blue eyes are better able to see in the dark.
153
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
More redheads are born in Scotland than in any other part of the world.
85
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
According to a study, women ages 22 to 30 with no children and no spouse earned a higher median income than comparable men in 39 of the 50 largest U.S. cities in 2008.
9
You can only remember 4 things at a time.
31
The average person walks the equivalent of twice around the world in a lifetime
69
Men laugh longer, louder, and more often than women.
61