Earth Notes

The Colorado Plateau is one of North America’s human and environmental treasures. Ancient cultures have called this land of sun-baked deserts and lush mountain landscapes home for centuries. Earth Notes, KNAU’s weekly environmental series, explores the Plateau by telling stories of the intricate relationships between environmental issues and our daily lives.

Rooted in science and wrapped in human interest, the two minute long segments encourage listeners to think of themselves as part of the solution to environmental problems. Upbeat and informative, the program tries to foster hope and dampen despair about the environment, and motivate listeners to become more conscious and informed stewards of the Colorado Plateau.

Elevated E. coli levels are, unfortunately, not unheard of in Oak Creek  – whether it be from a sewage spill like the one earlier this summer, or because of crowded recreation spots where humans and other animals leave behind waste.


What does a flower look like to a hummingbird? New research says it’s probably nothing like what humans perceive, because hummingbirds can spot ordinary colors blended with ultraviolet light. 

Earth Notes: Ghosts Of Flight

Aug 5, 2020

Remnants of ghost towns are a familiar sight across the northern Arizona landscape, but relics from aviation history are also present.

Before foresters or biologists can collect pine cones, examine pest infestation, or follow their study-animal up a tree, they have to go to tree climbing school.

American Crows and Common Ravens are widely seen all over the Southwest. Both species are in the same genus, Corvus, and both are obsidian-black in color. That can make it tough to tell them apart where their ranges overlap.