It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Studies suggest that people who appear to be constantly distracted have more "working memory" and "sharper brains".
13
About 2/3 of American men prefer boxers to briefs.
83
Males sweat 40% more than females.
104
Someone on Earth reports seeing a UFO every three minutes.
180
According to some estimates, Americans are sitting on $30 billion worth of unredeemed gift cards.
223
Two in five people in the world marry their first love.
270
Babies crawl an average of 200m a day.
212