Endangered Species

At least 21 percent of plant species are threatened with extinction, but much remains to be discovered.

Eggs and hot sand do not mix.

The founder of SOS Elephants works to save elephants from poachers and other threats.

Projects bring energy to ranger stations in Chitwan National Park, plus economic opportunities for nearby women.

One of Malaysia’s last three Sumatran rhinos was euthanized to relieve her suffering from untreatable cancer.

Facing new threats — including toxins from illegal marijuana grows — the fate of this little-known mammal hangs in the balance.

Programs to protect endangered species face the axe, as does the entire Marine Mammal Commission.

Many species could go extinct if the border wall is built, experts warn.

Dangerous times call for a new kind of environmental news site.

Conservation requires optimism. These experts share how they maintain it.