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.
November 2, 2011 While much of the world worries about how to sustain 7 billion people, in many countries, low birthrates are the more pressing problem. From Germany and Russia to Japan and South Korea, leaders are desperate to reverse a trend of lower birthrates.
November 2, 2011 To sustain themselves, many nations adopt policies to raise, lower, or maintain their population levels. And while a country's gross domestic product can often help predict its stance, that's not always the case.
November 2, 2011 The grandest expression of the world's population growth is the word "megacity." In them, people and ideas clash: The ancient collides with the modern; secular with religious; global with local. In Karachi, Pakistan, those forces can be seen in the story of a single piece of real estate.
November 1, 2011 As the world's population tops 7 billion people, population experts are worried about inevitable increases in cars, computers, bigger homes and a drain on resources. In an effort to combat this, one California company is producing small, energy-efficient homes — some as tiny as 300 square feet.
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 31, 2011 The U.N. says today symbolically marks the moment when the world's population reaches 7 billion. A little more than two centuries ago, the global population was 1 billion. How did it grow so big so fast? With the help of a sound montage and video, it gets a bit easier to see how the Earth can produce that kind of a crowd.
October 31, 2011 Monday marks the symbolic arrival of a milestone in the world's population: 7 billion humans. And as the number of people grows, so does the need for infrastructure to support them, such as roads and schools. Both China and South Sudan have fast-growing populations, but the challenges the two countries face are vastly different.
October 30, 2011 When the world's 7 billionth person is born sometime on Oct. 31, there's a good chance he or she will be born in India, where 51 babies are born every minute. A visit to the most densely populated neighborhood in one of the world's densest cities offers a look at what life might be like for Citizen No. 7 Billion.
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.
July 29, 2011 The United Nations says that the seven-billionth person will soon be born into this world — most likely in India, which is on track to overtake China as the most populous nation in just 16 years. Less-developed regions of the world will be responsible for nearly all the global population growth for the next four decades, while the richer nations' population growth looks to be flat.