The passenger pigeon was once the most numerous bird in the world, but in just half a century, it had gone extinct.

The case of Japan presents an even bleaker picture of a country that is grappling with the problem of population decline.

There are some analysts who think the peak is coming much quicker. The population will eventually peak, but "one after ...

The US Census Bureau estimates that in January 2025, there will be approximately 4.2 births and 2.0 deaths registered every ...

Primates have big brains, but so do elephants and whales. Elephants and whales, however, have much larger bodies that their ...

In January 2025 alone, the U.S. is expected to see one birth every 9.0 seconds and one death every 9.4 seconds, according to ...

Dental characteristics provide important insights into population history and ... Variations in tooth shape, size, and form among modern human populations could be attributed to adaptive changes ...

Genetic diversity in a given population can be reduced in what is ... a now-extinct group of human ancestors who originated in Asia. But after that initial meet-up, Papua New Guineans became ...

The Zlatý kůň/Ranis population coexisted with Neanderthals in Europe. However, their genomes showed no evidence of recent interbreeding with Neanderthals. This contrasts with other early human groups ...

It predicted the population would continue to rise exponentially until it reached a carrying capacity of about 500 animals, hovering around that size for the next few decades. What that model ...

They were part of a pioneer population that eventually died out, making them a ‘lost branch’ of the human family tree. Zooarchaeologist Dr Geoff Smith studied more than a thousand bone fragments found ...