There are approximately three chickens for every human on Earth.
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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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Denmark has twice as many pigs as there are people.
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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.
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There are about 255 babies born worldwide every minute.
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It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
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Roughly 90% of the world's population live in the northern hemisphere.
18