Population ecology is the study of how populations — of plants, animals, and other organisms — change over time and space and interact with their environment. Populations are groups of organisms of ...

Researchers formulated a mathematical equation that unifies 12,000 years of human population growth and points to an alarming worst-case scenario. Reading time 3 minutes As the global population rises ...

The introduction of hippos into the wild in Colombia has been marked by their rapid population growth and widespread dispersal on the landscape, high financial costs of management, and conflicting ...

The economic impact of changes in population growth rates and age structure can dramatically shift as countries transition from high to low rates of mortality and fertility. Initially, mortality ...

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.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A new U.S. Census Bureau report found that the U.S. population grew by ...

Swiss voters backed stability over a hard population cap, despite widespread concerns about growth and immigration.

In recent years, the idea of having fewer children or not having children at all has been put forward by some climate activists as way to tackle climate change. A few scientific studies have ...

In 2025, population growth rates fell in 48 states as international migration declined nationwide. The number of states with populations that grew more slowly than their long-term trends tripled to 30 ...

Immigration crackdowns may be slowing U.S. population growth and reshaping the economy, says Luke Pardue, policy director at the Aspen Institute Economic Strategy Group. The Trump administration's ...

Minnesota’s population has grown in three ways: naturally via more births than deaths, people moving here from other states and international migration. Demographers point out, however, that in as few ...