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 ...
Even though these particular lunar craters aren't visible from your backyard, Kring says there are similar, but smaller canyons on the near side of the moon that's visible in the night sky. These ...
In a significant discovery, a team of scientists at the Lunar and Planetary Institute (LPI), an institute of the Universities Space Research Association (USRA), found that two immense canyons hidden ...