Some park visitors refused to evacuate during Kilauea's hazardous eruption.

Greenland’s remote eastern fjords are a place of elemental beauty, where glaciers carve through the land, musk oxen roam ancient valleys and human resilience is tested against the raw power of nature.

The CW's ambitious "Crisis on Infinite Earths" crossover stretches across five different shows, making it a challenge to know ...

January doesn’t skimp on cosmic sightseeing. The month begins with a vibrant supermoon, continues with the year’s best Jupiter view, and ends with multiple moon-planet conjunctions. Aurora activity ...

Forty years after the space shuttle Challenger disintegrated shortly after liftoff, the disaster remains one of the most ...