According to some estimates, Americans are sitting on $30 billion worth of unredeemed gift cards.
223
Women rate men more attractive if other women are looking and smiling at him.
17
In 2002, Kenyan Maasai tribespeople donated 14 cows to the US to help with the aftermath of 9/11.
22
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
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
The average person walks the equivalent of twice around the world in a lifetime
69
Males sweat 40% more than females.
104