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 ...

One figure widely quoted by pest control companies: There are 1,000 pounds of termites for every human on Earth. If you like big numbers, the 2018 report is delicious reading. Recently ...

(AP Photo/Phelan M. Ebenhack, File) Updated [hour]:[minute] [AMPM] [timezone], [monthFull] [day], [year] Immigration in 2024 drove U.S. population growth to its fastest rate in 23 years as the nation ...

Human minibrains in little vials surprised scientists by surviving a stint in low-Earth orbit. US researchers sent lab-grown blobs of human neural tissue known as organoids for a short holiday on the ...

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 ...

From periods of rapid aging in our 40s and 60s to ancient brains that don’t decompose, here are some of the year’s most intriguing stories about human biology It can sometimes feel like health ...