A Grand Canyon river rafting guide who aimed to become the first American woman to row across the mid-Pacific solo has ...

Historic heat and big fireworks displays could spur a double dose of smoke pollution and ozone.

As the Aspen Acres wildfire rages in Colorado, video shows a ranch crew evacuating horses to safety under smoke-filled skies.

Lava fountaining is ongoing at the summit of Kilauea volcano in Hawaii, with fountains from the north vent reaching an ...

Experience the awe-inspiring eruption of Kilauea, Hawaii's most active volcano, as molten lava cascades down rugged slopes ...

During a nearly 8-hour eruption of Hawaii's Kilauea volcano on June 14th, a vortex of ash and debris was seen by spectators ...

Every tourist desperate to see an untouched paradise is part of a constant influx that risks despoiling the very thing they came to see. On his arrival, in 1835, Darwin marveled at the lack of fear ...

A fountainous Kilauea volcano eruption in Hawaii was accompanied by a small tornado-like vortex that spun up right next to the lava light show.See it in the video above.Nicknamed a "volnado," the ...