An extinct rodent relative of the capybara appears to have had a smaller brain-to-body ratio than similar species.

The wild population of the species was declared extinct almost 40 years ago, but now researchers have found their genes in a pack of canines near the Gulf coast.

During the last ice age, there wasn’t much plant matter to eat on northern steppes, but herbivorous woolly mammoths were abundant. How did they survive?

Researchers identify the Lord Howe Island stick insect on the remains of a large volcano in the Tasman Sea between Australia and New Zealand.

Intricate, digital maps of animals’ teeth, created using the same geographical tools used by mapmakers, may help researchers determine the diets of extinct species.

What researchers are learning as they sequence, map, and decode species’ genomes

Rediscovery of a snail thought to be extinct has raised questions about the peer-review process that approved the publication of the extinction report.

A roundup of species that made their scientific debut in 2012, and a few that said goodbye as well