It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
If you're over 100 years old, there's an 80% chance you're a woman.
143
Yawns are more contagious among people with closer relationships.
163
People with blue eyes are better able to see in the dark.
153
The Japanese commonly put ketchup on their rice.
16
There are 189 people named 'Lol' in the U.S.
11
Babies crawl an average of 200m a day.
212