Modern humans (Homo sapiens) are grouped with the mammals (class Mammalia) in the subphylum Vertebrata. Within the mammals, humans are assigned by taxonomists to the primates (order Primates), along with lemurs, monkeys, and apes. Humans are grouped by...

The world population is the total number of humans on Earth at a given time. In September 2007, the world's population is believed to have reached over 6.6 billion.[1][2] In line with population projections, this figure continues to grow at rates that...

WORLD POPULATION. By Stanley Johnson. Graham & Trotman; 350 pages; Pounds 68 and $110. ULTIMATE SECURITY. By Norman Myers. W.W. Norton; 320 pages; Pounds 17.95 and $28. THE GREENING OF MACHIAVELLI. By Tony Brenton. Earthscan; 300 pages; Pounds 29.95. Distributed in...

Over the tens of thousands of years of human history, billions of people have lived on planet Earth. And today, the world population stands at about 6.7 billion people. What percentage of the people who ever lived on Earth are alive today?...

The world's population will likely reach 9.2 billion in 2050, with virtually all new growth occurring in the developing world, a U.N. report said Tuesday.According to the U.N. Population Division's 2006 estimate, the world's population will likely increase by 2.5 billion people over the next...

Science and Society on the Issue of World Population