Two hikers were injured in a bear attack on a popular hiking trail near Yellowstone National Park’s Old Faithful geyser

Yellowstone National Park has a new thermal vent spewing steam in the air that could be visible to tourists once visitors flock back into the park

Law enforcement officers in western Wyoming say the driver who struck and killed a famous grizzly bear south of Grand Teton National Park was not speeding and the bear's death was an accident

The rush to build wind farms to combat climate change is colliding with preservation of one of the U.S. West’s most spectacular predators, the golden eagle

A project in the country's top coal-producing area seeks to pump the carbon dioxide produced by burning that coal back underground

A U.S. senator is apologizing after getting booed and heckled for remarks she made on sexual identity during a university graduation speech

Ideas for reducing greenhouse gas in the atmosphere are getting a funding boost from famed entrepreneur Elon Musk

The governors of four Rocky Mountain states say they will cooperate on developing ways to make hydrogen more available and useful as clean-burning fuel for cars, trucks and trains

The North Platte River in southern Wyoming is flowing low, slow and warm — not great conditions for trout fishing