When authorities find wildlife that are being illegally trafficked, at ports or airports, the animals are often in terrible shape. Sick, starved, distressed. A pilot project in Southern California aims to get seized wildlife immediate care.

Scientists are looking at the ways humans change the planet — and the impact that has on the spread of infectious disease. You might be surprised at some of their conclusions.

In a landmark U.N. study, researchers found nearly half of the world's threatened migratory species have declining populations. More than a fifth of the assessed animals face extinction.

The Key deer is losing the only place it lives, raising uncomfortable questions for the people tasked with keeping endangered species alive.

A new global assessment of the world's amphibians finds that more than 2 of every 5 known species is at risk of extinction. Habitat loss, disease and climate change are the main drivers.

The most significant part of the U.N. pact is a commitment to protect 30% of land and water considered important for biodiversity by 2030, up from 17% of terrestrial and 10% of marine areas.

"The loss of nature and rising water insecurity are global health threats that must be confronted together," Secretary of State Antony Blinken said.

The influential and sometimes controversial Harvard professor first made his name studying ants. He later broadened his scope to the intersection between human behavior and genetics.