Presidents Day is Monday, Feb. 17. Here's what you need to know about everything open and closed for the holiday, including ...

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

While a visit to the Grand Canyon is mesmerizing and worthwhile, it's not necessarily easy. We consider the closest and most ...

The far side of the Moon has its own versions of the Grand Canyon—two of them, in fact! A new study explains how these deep ...

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

If you're planning the perfect marriage proposal, you know the location is key. Try one of these seven spots in Arizona, ...

An avalanche swept away two backcountry skiers in a Utah canyon, killing one and seriously injuring the other, officials reported. The 150-foot-wide avalanche slid about 700 feet at the 10,000-foot ...

Shutterstock A Grand Canyon in Upstate New York In Upstate New York, you’ll find a natural wonder that matches the beauty of ...

That's good news for scientists and NASA, which is looking to land astronauts at the south pole on the near, Earth-facing ...

To get there, you’ll have to hike a vertical mile into the depths of the Grand Canyon. This sought-after campground fills up quickly, so plan ahead and get your permit early. A few walk-in permits may ...