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

Last time we learned about Mars' great Valles Marineris, the largest canyon in the solar system. But what about here on Earth, is the Grand Canyon really the biggest?

For more information, visit the Lowell Observatory's website. Grand Canyon Railway Train Tickets (594 reviews) Antelope Canyon and Horseshoe Bend Day Tour from Flagstaff ...

Erin Evans, Managing Editor Waimea Canyon, aptly nicknamed the "Grand Canyon of the Pacific," should be at the top of every traveler's itinerary. This massive gorge – which measures 14 miles ...

PHOENIX — Led by Tyon Grant-Foster's 17 points, the Grand Canyon Antelopes defeated the Tarleton State Texans 88-64. The Antelopes improved to 13-5 with the win and the Texans fell to 8-12.

PHOENIX (AP) — Tyon Grant-Foster's 17 points helped Grand Canyon defeat Tarleton State 88-64 on Saturday night. Grant-Foster had five rebounds for the Antelopes (13-5, 3-1 Western Athletic ...

Hrvoje Tkalčić receives funding from the Australian Research Council. Weijia Sun does not work for, consult, own shares in or receive funding from any company or organization that would benefit ...

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 ...

5) Valles Marineris: A Grand Canyon on Mars The Valles Marineris canyon system on Mars is one of the largest canyons in the solar system, stretching over 4,000 kilometres (2,500 miles) and ...

Trails in Grand Canyon National Park were closed due to a chlorine gas leak. Chlorine is used as a disinfectant in the Roaring Springs area of the park. The trails have since reopened NORTH RIM ...

SINGAPORE - On Jan 16, people in Singapore will have the opportunity to witness Mars at its closest, brightest, and most vivid this year. The Red Planet will be in opposition, an astronomical term ...