Earth Notes

By KNAU Arizona Public Radio

Earth Notes, KNAU’s weekly environmental series, explores the Colorado Plateau by telling stories of the intricate relationships between environmental issues and our daily lives. Rooted in science and... more

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FAQs about Earth Notes:

How many episodes does Earth Notes have?

The podcast currently has 79 episodes available.

Earth Notes episodes:

March 25, 2026 Earth Notes: Acoustics for Conservation
Researchers in the Southwest are using hidden recorders to capture the fluted whistles of the pinyon jay. It’s part of a new effort to track ecological changes through sound.
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2min
March 18, 2026 Earth Notes: Hoof Highways
Every spring, thousands of sheep were herded on a three-week trek across northern Arizona, up onto the Colorado Plateau for summer grazing.
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2min
March 11, 2026 Earth Notes: 1-17 Wildlife Crossing
A wildlife bridge on Interstate 17 south of Flagstaff could help guide elk, deer and other wildlife navigate the highway and cut down on collisions with cars and trucks.
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2min
March 04, 2026 Earth Notes: The Legacy of Hat Ranch
Hat Ranch near Williams, Arizona has a layered history of conservation and public life.
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2min
February 25, 2026 Earth Notes: Cottonwood Leaf Cooling
Fremont cottonwoods form a ribbon of green along Arizona’s rivers and streams. They have heart-shaped leaves which turn golden in fall and fluffy, cotton-like seeds.
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2min
February 18, 2026 Earth Notes: Signs of Passage on Route 66
Route 66 is known for roadside history, but the landscape also holds older signs of passage and human movement.
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2min
February 11, 2026 Earth Notes: Why Night Lighting Draws Winged Insects
Artificial light including flames have been known to attract moths and many other flying insects at night for centuries. Earliest written records of the behavior date back to the Roman Empire.
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2min
February 04, 2026 Earth Notes: The Ghostly Glow of Gegenschein
If you look toward the eastern horizon just before dawn on a clear, moonless night, you should see a ghostly white glow shining up through the dark sky.
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2min
January 28, 2026 Earth Notes: Coyote-Badger Cooperative Hunting
Coyotes and badgers are well-known predators of the American wilderness. What is not well known is that these two species, normally competing for the same prey, sometimes become hunting partners.
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2min
January 21, 2026 Earth Notes: The Future of Saguaros
Saguaro survival is now being challenged at all elevations by climate change.
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2min

FAQs about Earth Notes:

How many episodes does Earth Notes have?

The podcast currently has 79 episodes available.