grand canyon

Melissa Sevigny

The Grand Canyon’s North Rim is overrun with bison. They trample wetlands and lake shores and devour the grass. That’s changing the ecosystem, a situation that’s been building for more than a decade… Now the National Park Service intends to do something about it. KNAU's Melissa Sevigny reports.

NPS

Officials at Grand Canyon National Park are proposing updates to an aging water pipeline. KNAU’s Ryan Heinsius reports, the rim-to-rim system supplies water to the entire park. 


Scott Thybony

Arizona is in the midst of an intense summer heatwave. As uncomfortable as it might be, the summer season, historically, signifies life and growth. Commentator Scott Thybony recently traveled to a summer solstice spot in the Little Colorado River Basin, and brings home the point that summer is deliberate and necessary. 


National Park Service officials say a historic cemetery at the Grand Canyon is closed to new burials because of a lack of space.

Earth Notes: Edgar Alexander Mearns

Jun 14, 2017
Smithsonian Institution Archives

On a cloudy, windy day in June 1887, Edgar Mearns climbed Mount Humphreys, Arizona's highest peak. Taking shelter behind a pile of stones, he was joined by a broad-tailed hummingbird—a fitting companion for one of America's greatest ornithologists.


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