A new U.S. Census Bureau report projects the global population aged 65 and older will more than double by 2060.

The U.S. could add 28 million people by 2050, with Texas and Florida alone accounting for 62% of the projected increase.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Nevada, Utah, Idaho, Texas, and Arizona saw the fastest population ...

There is a growing consensus that environmental problems, particularly the effects of climate change, pose a grave challenge to humanity. Pollution, habitat destruction, intractable waste issues and, ...

Populations grow at geometric or exponential rates in the presence of unlimited resources. Geometric populations grow through pulsed reproduction (e.g., the annual reproduction of deer, which have a ...

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 ...