The intergovernmental organization reports “accelerating” species extinctions, with 25 percent of animal and plant species evaluated under threat of extinction.

Researchers analyze 146 samples from close to 80 sites, with nearly a third of samples coming from the Arctic Ocean.

After three years with very few new chicks, the birds are abandoning one of the biggest breeding sites on the continent, satellite images show.

The blue lagoons of the Cuatro Ciénegas Basin provide a glimpse into the planet’s ancient past.

Chelonoidis phantasticus, or the Fernandina giant tortoise, was feared extinct until an expedition found a lone female in a remote area on the island of Fernandina.

China’s ongoing Belt and Road Initiative passes through areas that are already at risk of swapping organisms.

The lay of the land shapes the diversity of groundwater-dependent salamanders.

Researchers identify a new species of Hemimastigophora protist, and suggest the group should be promoted from a phylum to a supra-kingdom.

A newly described amphibian has such a small range in southern Brazil that it’s already critically endangered.