As the wild population of red wolves falls to just 40 animals, captive breeding may be their last chance for survival.

Exhaustive searchers have failed to turn up the lost Algerian species Adenocarpus faurei. Could other plants in the region also be extinct?

Eco-books coming out this month cover some of the most important topics on the planet — and give you some tools to help.

Thanks to protective efforts in Russia, these critically endangered big cats have renewed hope of avoiding extinction.

The key to saving elephants and other species may lie in the DNA contained in their droppings, says conservation biologist Samuel Wasser.

The “extinction capital of the world” could start losing unique plant species in as little as a month if funding disappears.

Dozens of these water-filtering species are at risk of vanishing, and that’s bad news for every living creature that relies on them.

The rules, bemoaned by auto manufacturers, would have reduced carbon dioxide emissions by 540 million metric tons.

Eco-books coming out this April look at the life and death of Cecil the lion, the history of oppressive oil development, and living a zero-waste lifestyle.

Video: The big cats face a long list of threats, from climate change to habitat loss to the illegal pet trade.