In Huntsville, a city fueled by defense and aerospace, there is anxiety but also cautious optimism that federal investment ...

Arizona The Grand Canyon is a testament to the earth's artistic powers, with its sprawling vistas and breathtaking colors.

Cameron Trading Post and The Grand Canyon East Rim The Grand Canyon is on most Arizona itineraries. Obviously, it’s because ...

Two such lunar canyons, Vallis Schrödinger and Vallis Planck, stretch over 270 km (168 miles) each, with depths of 2.7 km ...

Wayne Martin Belger set out to make indelible photos of a mystical site on the Navajo Nation. First he needed to relearn how to walk ...

Two gargantuan canyons on the moon were carved by a hailstorm of rocks — and that’s good news for future lunar astronauts.

Scientists say Vallis Schrödinger and Vallis Planck—dramatic trenches near the lunar south pole—were carved in a blast that ...