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Colorado River

Grand Canyon National Park welcomes more than four million visitors per year.

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 spilled out westward onto the landscape that would eventually become the Grand Canyon

Researchers found fragments of fossils representing prehistoric mollusks, crustaceans and worms among rocks at the Grand Canyon.

Trove of Fossils Uncovered in the Grand Canyon Offers a Rare Glimpse Into Cambrian Life, With Toothy Worms and Slug-Like Mollusks

Rocks found along the Colorado River in Arizona turned out to contain fossilized fragments of soft-bodied creatures, suggesting the site may have been an “evolutionary hotbed”

The Aria Resort & Casino, a striking pair of curved buildings on the Las Vegas Strip, bills itself as eco-friendly and water-efficient.

Las Vegas Is Going All In on Its Water Conservation Plan

As the Southwest dries, can a city notorious for excess find a way to survive with less?

Returning Rapids Project investigator Chris Benson examines old photos of the Colorado River to see how it has changed over time.

Citizen Scientists Document a Recovering Colorado River

The Returning Rapids Project charts a resurgent waterway and its surrounding ecosystems

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There's More to That

Hear What’s Happening to the Colorado River From a Photojournalist Who Has Spent His Entire Life Alongside It

In the latest episode of “There’s More to That,” learn about the Western waterway that affects the lives of everyone in the United States