The male, named Cinco, is only the fifth jaguar seen in southern Arizona in 15 years. The sighting gives conservationists hope for their future.

A new line of research has revealed a surprising finding about how the presence of wolves helps keep people safe.

The near-extinction of vultures in India has had severe consequences.

The Trump administration announced plans to roll back protections for plants and animals under the Endangered Species Act.

An emerging area of research is uncovering hidden links between nature and human health.

An emerging area of research is uncovering hidden links between nature and human health.

Scientists using new ways to eavesdrop on fish have captured a cacophony of thumps, honks, burps and grunts in underwater recordings.

A sweeping analysis of more than 4 millions recordings has found birds tweet for nearly an extra hour a day in areas disrupted by light pollution.

The adorable salamanders are helping scientists investigate a serious question: Could the human body be coaxed to regrow a lost arm or leg?

Gene editing holds the potential of suppressing mosquito species that carry deadly diseases — and raises ethical questions.

“A hundred years from now, they will be talking about this flood,” said one resident in Western North Carolina, where the extent of the disaster is only beginning to emerge.

Birds are rapidly vanishing from North America, with dramatic population losses in places that were once thought safe.

Interior Department officials are considering scaling back the boundaries of national monuments in the West to encourage energy development on public lands.

The Pacific Islands Heritage Marine National Monument comprises more than 490,000 square miles of some of the Earth’s last pristine maritime environments.

A proposed rule would narrow the definition of harm under the Endangered Species Act and could open the door to more mining, construction and other activities.

The interior secretary hailed a biotech company’s claim to have brought back the dire wolf, while the administration and GOP push to roll back species protections.

Crustaceans, snails, worms and fish are among the dozens of creatures that deep-sea explorers discovered under a massive Antarctic ice shelf.