AP) — New research shows that when an asteroid slammed into the moon billions of years ago ... two canyons comparable in size to Arizona's Grand Canyon in barely 10 minutes.

Before 2015 more people had stood on the moon (12) than had completed a continuous thru-hike of the Grand Canyon (eight). When photographer Pete McBride heard about Rudow’s plans, he called him ...

Grand Canyon National Park was named an International ... an audience of about 30 gathered to sit and look out over the ...