The Environment

Biologists are racing to save America’s freshwater mussels—the water-filtering keystone species that once filled the country’s rivers and streams—from extinction

These images, conservationists say, are evidence that wildlife corridors are paying off

Strikes to Iran’s Bushehr nuclear power plant could release long-lasting radioactive cesium 137 into the Persian Gulf, causing environmental calamity and threatening drinking-water supplies for millions

Decades of data reveal that animals involved in the wildlife trade—from pet sales to meat markets to illegal poaching—are much more likely to carry pathogens that can infect humans

An update on NASA’s historic moon mission, alarm over the low snowpack in the western U.S. and a move that could endanger wildlife in the Gulf of Mexico

These incredible corals form what may be one of the world’s largest reef systems—and researchers have a plan to restore it

It was a tough decision to leave Timmy the humpback whale to die on a small island in the Baltic Sea

The Department of Health and Human Services and the Environmental Protection Agency announced a joint effort to track microplastics in drinking water—but experts say doing so will be difficult

A treasure trove of fossils from China shows that the Cambrian explosion may have been less explosive than scientists once believed

A Wisconsin-sized region of frozen soil is thawing fast, releasing three trillion more gallons of water per year than it did just four decades ago

On their voyages to the moon, NASA’s astronauts are finally getting some creature comforts of terrestrial toilets—such as having a door and being able to pee and poop simultaneously

A record warm winter meant that snow levels across the western U.S. were already low, but an incredible March heat wave has made things even worse