A new study highlights how life possibly evolved prior to and during the rise of Earth’s oxygenated atmosphere.

An iconic apex predator appeared through thick fog like an apparition and cautiously watched a photographer in Yellowstone ...

Aspen, Colorado Aspen perfectly illustrates the blend of luxury and natural beauty. Known worldwide for its ski resorts, ...

A heart-stopping moment in which a California 'touron' was nearly gored by an elk was caught on camera.

There are five Montana National Parks including two gems in the National Park Service; Glacier and Yellowstone National ...