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Top Countries Without SanitationThe top countries for poor sanitation, by number of people without access to sanitary sewage facilities.
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7 Population Milestones for 7 Billion PeopleCould you be the Earth's 3 billionth baby?
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Will There Really Be 10 Billion People by 2100? -
Earth's Annual Resources Used Up Today, Group SaysAs of today, humanity is in debt to Earth's 2011 resources.
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How Do You Count 7 Billion People?The UN compiles a mind-boggling array of demographic, health and census data in order to estimate the world population.
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Timeline: Earth's Precarious FutureFrom rising seas to a slight increase in Earth's rotation, find out when it'll all go down.
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Human Evolution Speeds UpGenetic evidence shows that culture, population growth influencing evolution.
