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 ...

GRAND CANYON, Ariz. — When I first peered into the layer cake that is the Grand Canyon several years ago, I was surprised to spot a continuous strip of green between a grayish section and a red-brown ...

Millions of people around the world know of the Grand Canyon and many Arizonans have visited it — but few comprehend the incredible complexity and age of the rocks that form this vast gash in the ...

LAS VEGAS – May 3, 2023 – The Grand Canyon is one of the Seven Wonders of the World, visited by millions of admirers each year. So, naturally, you’d think that all of its rock layers had been studied ...

Dams are not just a 20th Century phenomenon in Grand Canyon. As early as 1882, geologists realized that the Colorado River was blocked several times in the past by huge lava dams. They theorized that ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American One hundred years ago last week, Woodrow ...

Grand Canyon backcountry permits: https://www.nps.gov/grca/planyourvisit/backcountry-permit.htm U.S. Geologic Survey explanation of Grand Canyon geology: http ...