If the population of China walked past you, in single file, the line would never end because of the rate of reproduction.
1k
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Denmark has twice as many pigs as there are people.
66
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
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
Roughly 90% of the world's population live in the northern hemisphere.
18