The Grand Canyon Under Stormlight Few places on Earth hold the weight of time like the Grand Canyon, carved by the relentless flow of the Colorado River across nearly two billion years of geological history. Stretching 277 miles (446 km) in length, up to 18 miles (29 km) wide, and plunging more than a mile deep, its red and ochre cliffs are a living archive of Earth’s story, layer upon layer etched in stone. But even this ancient landscape is not immune to nature’s raw drama. When monsoon storms