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 approximately three chickens for every human on Earth.
13
Only about 2% of the world population has green eyes.
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Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
There are about 255 babies born worldwide every minute.
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About two hundred babies are born worldwide every minute.
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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.
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