It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
More boys than girls are born during the day; more girls are born at night.
120
If you're over 100 years old, there's an 80% chance you're a woman.
143
The most dangerous job in the United States is that of an Alaskan Crab Fisherman.
65
There are two credit cards for every person in the United States.
2
