An analysis of federal data shows a pronounced decline, despite alarming conditions found at some manufacturers.

Weather modification practices have become a political target. But a different story has been playing out in the West.

Regulations make it hard to introduce organisms that quash invasive species. Some experts see missed opportunities.

A longstanding push for urgent action on environmental toxins is landing in an unprecedented time in American politics.

It was thought that Aedes aegypti could not survive in the Mountain West. But now, a population is thriving in Colorado.

The explosion of populations east of the Mississippi was made possible by logging and the slaughter of wolves.

State health officials appear to have deviated from the usual response during an outbreak after it killed two infants.

Some experts believe CKD is the first chronic illness directly linked to climate change. Prevention may be possible.

Jeffrey Kluger's "Gemini" argues that the program was more milestone than stepping stone in the 1960s space race.

Chatbots weren't designed for mental health, but they are increasingly used for therapy. What are the risks an benefits?