The biggest threat to Ukraine’s cities can strike with little or no warning. On one night alone this week, a barrage of more ...

The federal government has finalized a plan that will require California, Arizona, and Nevada to reduce water usage from the ...

Colorado has a lot of trails, but the Switzerland Trail in Roosevelt National Forest near Boulder is the kind of place that ...

From peekaboo bathroom windows to a lack of spaces to work, these are the design choices we wish hotels would stop making.

Before Colorado was named after the region’s muddy, red-tinted Rio Colorado, it was known as a fabled land in the American ...

Watch the Aug. 12 total solar eclipse live online, or catch a partial eclipse from parts of the northern U.S. with proper eye ...

Trump has denied reports that the U.S. is draining its munitions stocks, which could affect American operations against Iran.

Yet extreme heat also disrupts flights and travel plans. On the hottest days, thinner air can make it harder for aircraft to ...

Since the 1970s, the number of extremely hot days recorded in a given year has increased by a month or more in some places.

The decision to drop an atomic bomb on Hiroshima continues to stir debate today.

Air travelers brace for delays during severe storms, but extreme summer heat can trigger hidden disruptions that are far less ...

Mediators have finalised a draft agreement to reopen the strategic waterway and that indirect US-Iran talks have entered the "final stage".