It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Only 2% of the Earth's population are natural redheads.
13
The average American consumes 9 pounds of food additives every year.
6
Touching a teddy bear can make people feel less lonely.
36
The Japanese commonly put ketchup on their rice.
16
The first man to swim the length of Great Britain grew a beard to stop jellyfish stinging his face.
16