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.

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

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

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.

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

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