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Animal Kings: Ants, like these workers carrying eggs to a plant's leaf after rain flooded their nest, have a combined biomass estimated in the billions of tons.
November 3, 2011 There are now 7 billion people, according to the U.N.'s population division. That prompts a question: Who else is in the 7 Billion Club? To learn which other animals had reached that plateau, we asked wildlife experts — who said it's a tough call.
Several babies born today have been deemed the symbolic 7 billionth person — including a little girl named Nargis in Lucknow, India. Here she is with her mother, Vinita.
October 31, 2011 While the U.N. has declared that the world's population hit 7 billion today, it also concedes there's a 1 to 2 percent margin of error. And that the milestone might have been reached six months ago — or might not happen for another six months.
October 28, 2011 National Geographic calculates that the most typical person is a 28-year-old Chinese man. Meanwhile, check out interactive tools that estimate how many people were alive the day you were born.
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