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Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object ...

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Coronado traveled in search of a city filled with treasures ... discovery that was made six hours away in the Grand Canyon, dating back over one billion years ago. Let's take a closer look.

In the afternoon, while his crew set up camp for the night, Powell would often climb into the canyon to investigate. Much has been learned about the geology of the Grand Canyon and about the ...

With 22 national parks and monuments to its name, Arizona boasts some of the most astonishing landscapes in the country, from the Grand Canyon to the towering buttes of Monument ...

PHOENIX (AZFamily) — Major trails at the Grand Canyon re-opened Thursday afternoon after being closed for nearly 20 hours following a chlorine gas leak inside the canyon last night. The closures ...