Our earth is about 4.55 billion years old with a total surface area of 510.072 million sq km of which 148.94 million sq km is land and 361.132 million sq.km (almost 70%) of the surface is covered with ...

The country's immigrant population may have dropped by roughly 2 million people in the first six months of the year, according to new government data. The new data offer an early – if imperfect – ...

The U.S. Census Bureau makes adjustments to the population controls in the Current Population Survey each January. That means the sample weights are revised so that estimates from the CPS agree with ...

John Wilmoth is Director, Population Division of the United Nations Department of Economic and Social Affairs (UN DESA). Clare Menozzi, Lina Bassarsky and Danan Gu are Population Officers, UN DESA.