Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
973
In 2005, 25 percent of Americans over the age of 50 played video games, an increase from nine percent in 1999.
82
‘Old people smell’ is actually caused by a chemical, 2-nonenal, that old people secrete through their skin
8
Two in five people in the world marry their first love.
270
On average women can hear better than men.
170
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
More redheads are born in Scotland than in any other part of the world.
85
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11