The human enterprise is in overshoot, depleting essential ecosystems faster than they can regenerate and polluting the ecosphere beyond nature's assimilative capacity. Overshoot is a meta-problem that ...

A new data analysis found that India has successfully doubled its tiger population in just a decade. And experts say the endangered big cats have ongoing conservation efforts to thank for the ...

Studying human evolution involves piecing together scattered clues about how we survived against tough odds. One of the biggest mysteries is understanding how large or small ancient human populations ...

Global fertility rates have been falling for decades and are reaching historically low levels. While the human population now exceeds 8 billion and may top 10 billion by 2050, the momentum of growth ...

While most estimates place the current human population at around 8.2 billion, a new study suggests we might be vastly underrepresenting rural areas. By analyzing 300 rural dam projects across 35 ...

This is an updated version of a story first published on April 27, 2025. The original video can be viewed here. The world's population may have recently exceeded eight billion, but it's a deceptive ...

Japan's declining population in agricultural regions could be having a damaging impact on biodiversity—a trend that could spread through East Asia and Europe as global fertility rates fall—according ...

All species must reproduce to continue their existence. Furthermore, they must raise enough offspring to replace individuals who die. If reproduction falls below replacement level, a population ...