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
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
Nearly half of the entire world's adult population has never drunk alcohol.
12
About two hundred babies are born worldwide every minute.
237
Roughly 90% of the world's population live in the northern hemisphere.
18
If the population of China walked past you, in single file, the line would never end because of the rate of reproduction.
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