Study has a bold, new theory about the Grand Canyon's origins

The study says the Colorado River took a convoluted path as it carved the canyon — and got help from an ancient lake.
Smithsonian Magazine

Scientists Still Don’t Know How or When the Grand Canyon Formed. New Research May Hint at Its Ancient Origins

Researchers say the ancestral Colorado River formed an ancient lake in northern Arizona roughly 6.6 million years ago, which ...

What it was like to retrace the first expedition down the Grand Canyon a century later

One hundred years after John Wesley Powell’s historic trek down the Grand Canyon, National Geographic went on a commemorative ...