It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
There are about 255 babies born worldwide every minute.
46
Nearly half of the entire world's adult population has never drunk alcohol.
12
Only about 2% of the world population has green eyes.
36
There are approximately three chickens for every human on Earth.
13
If the population of China walked past you, in single file, the line would never end because of the rate of reproduction.
1k
Denmark has twice as many pigs as there are people.
66
Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70