Two airliners collided over the Grand Canyon—in broad daylight. How could they not see each other?

Pilots are trained to scan the sky. One optical illusion can still beat the human eye.
Scientific American

The Grand Canyon Is Getting Even Hotter and More Dangerous

CLIMATEWIRE | Grand Canyon National Park reported its first heat-related fatality of the summer in July, when a 57-year-old woman died while attempting an 8-mile hike in the remote Tuweep area of the ...

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 ...

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.