It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
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
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
There are approximately three chickens for every human on Earth.
13
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
Only about 2% of the world population has green eyes.
36
If the population of China walked past you, in single file, the line would never end because of the rate of reproduction.
1k