Populations of organisms do not remain constant; the number of individuals within a population changes, sometimes dramatically, from one time period to the next. Ecologists have documented examples of ...

How do we know if a species is heading towards extinction? Demographics help us understand the size, status, and behavior of populations. Broadly defined, demography is the study of the ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

More than a third of 50 recently surveyed Nobel laureates cited “population rise / environmental degradation” as the biggest threat to humankind. Second on the list was “nuclear war”, cited by 23 ...

Your support goes further this holiday season. When you buy an annual membership or give a one-time contribution, we’ll give a membership to someone who can’t afford access. It’s a simple way for you ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Research shows that our rapidly growing human population increases pressure on society and the environment, making it harder to address problems ranging from public health concerns to climate ...

The past 10 years have seen a steady increase in the number of international migrants across the globe, now totaling 214 million people. Ahead of the upcoming Commission on Population and Development, ...

Note (June 2025): Religious composition estimates in this report are based on 2010 baseline numbers that have since been updated. Please refer to our 2025 report “How the Global Religious Landscape ...