The National Park Service opened a lottery for extended self-guided rafting trips along the Colorado River in Grand Canyon National Park this week, offering hundreds of spots for 2026.

Each year, millions of visitors marvel at the geological intricacy and beauty of the vast chasm of the Grand Canyon carved ...

The Earth's Grand Canyon took millions of years to carve, but the moon's grand canyons took about ten minutes.

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons ...

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

Water is scarce in the Grand Canyon region. For every proposed development near the Grand Canyon, we ask: Where will the water come from? This question has sparked debate in the town of Tusayan, ...