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 ...

As the U.S. population grows older, cardiologists are increasingly caring for patients with frailty, multiple comorbidities and complex social needs. These shifts are pushing physicians toward ...

This article was produced by Capital & Main. It is published here with permission. By every available measure, California’s population is growing again, albeit modestly. The dark years following the ...

The global human population has been climbing for the past two centuries. But what is normal for all of us alive today — growing up while the world is growing rapidly — may be a blip in human history.

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.

Earth's population reached a new record in November 2022 when it became home to 8 billion people. The United Nations has predicted that by 2037, Earth's population will have reached 9 billion people.