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After the deadly Grand Canyon flood, a geologist and avid hiker explains what nature lovers need to prepare and watch for to stay safe.

When penguin colonies are surrounded by sea ice, the penguins tend to eat more fish, rather than krill. And colonies that eat more fish are more successful at sustaining their numbers.

Debate over turning public national park land into private profit dates back more than a century.

Targeted grazing is gaining interest as fire risk rises, particularly in hard-to-manage areas of the Western US. But it isn't always as simple as it seems.

The Environmental Rights Amendment of the PA Constitution guarantees the right to clean air, pure water and to the preservation of the aesthetic values of the environment.

A 'green' building has to last for its intentionally small carbon footprint to pay off. That includes surviving flood, storm or wildfire damage.

A geologist explains how thawing permafrost and melting ice are increasing the risk of destructive floods in the Himalayas and other high mountain regions around the world.

Scientists went to the heart of the El Niño pattern to learn from living and fossil corals. The results show El Niño's intensifying coincides with global warming.

Canada is a major US supplier of fertilizer ingredients that could get pulled into Trump's trade war. Farms can go without fertilizer for a while, but not long.

Wildland firefighters face heat from the environment, the fire and their own bodies as they work long, exhausting hours. The head of Purdue's fire lab explains the health risks and what can help.