I love the Grand Canyon, both personally (because of all the good memories I have of my adventures there), and as a scientist. I first saw it in the early summer of 1981 when I went on a six-week-long ...

Joe Elsen still remembers the moment when, drilling to set caissons near the future Hanging Lake Tunnel in the late 1980s, he first encountered the Glenwood Canyon’s “Gray Layer.” The muddy subsurface ...

The Grand Canyon has long been held up as a textbook example of slow, steady erosion carving a young gorge into ancient rock.

How old is the Grand Canyon? Most scientists agree with the version that rangers at Grand Canyon National Park tell visitors -- that the 10-mile wide chasm in northern Arizona was carved by the ...

Could the origins of the Grand Canyon lie in an enormous flood? The answer is no, says geologist Bill Dickinson, an emeritus professor of geology at the University of Arizona in Tucson. Tracing the ...

A couple of very good slot canyons make for an interesting add-on to the impressive geology hike at the upper portion of this canyon. The Roam-O-Rama write up “The pull-apart basin” from 11/22/17 ...

The shortest distance between the headwaters above the north rim of Glenwood Canyon and the canyon’s most iconic feature, Hanging Lake, is anything but a straight line. Along the way, a portion of ...

Starting out on a six-day series of wilderness hikes in the Grand Canyon on unmaintained trails where even a minor misstep can cost you your life is probably not the best time to discover you’re ...

Harper Canyon is home to hundreds of magnificent ironwood trees (Olneya terota). They can become quite large and, though the pinnately compound leaves don’t provide abundant shade, they are evergreen ...

Scientists have made a groundbreaking discovery beneath Antarctica, revealing a hidden network of over 332 colossal underwater canyons. These ancient structures, located 4,000 meters below the ice, ...

Could the origins of the Grand Canyon lie in an enormous flood? The answer is no, says geologist Bill Dickinson, an emeritus professor of geology at the University of Arizona in Tucson. Tracing the ...