grand canyon

Melissa Sevigny

The Grand Canyon is running short on sand. Sediment that once washed down the Colorado River to form beaches is now trapped behind Glen Canyon Dam. For two decades river managers have released artificial floods to rebuild the beaches … but it’s not clear if the river has enough sand for these experiments to work in the long run. That’s what scientists want to find out.

Melissa Sevigny

Tribes, environmental groups, and mining organizations have fought for years over tapping uranium resources on public land near the Grand Canyon. This week, the Ninth Circuit Court of Appeals will hear two cases that could affect the future of uranium mining in the area. Arizona Public Radio’s Ryan Heinsius reports.


NPS

Grand Canyon National Park has surpassed its visitation record for the second year in a row.

National Park Service

Auto exhaust at the Grand Canyon may be ruining more than just the view; it might be harming native plants, in particular. The National Park Service wants to know just how harmful excess nitrogen is to the ecosystem, so they offered a grant to soil ecologist Nancy Johnson at Northern Arizona University. Her study involved taking samples of soil, air and pinyon pine needles at the heavily trafficked South Rim. 


Pete McBride

Fewer than three dozen people have ever hiked the entire 800-mile length of the Grand Canyon. Two journalists on assignment for National Geographic completed the journey last month and have now been nominated as the magazine’s 2017 Adventurers of the Year. Arizona Public Radio’s Ryan Heinsius reports. 


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