There are approximately three chickens for every human on Earth.
13
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
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
Denmark has twice as many pigs as there are people.
66
If the population of China walked past you, in single file, the line would never end because of the rate of reproduction.
1k
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
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