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 72 episodes available.

Earth Notes episodes:

April 15, 2026 Earth Notes: Grand Canyon's Jaguars
Jaguars are usually associated with the tropics of Central and South America, but historical records show they once prowled as far north as the South Rim of Grand Canyon.
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2min
April 08, 2026 Earth Notes: Ancient Food Preservation
How did Southwest Tribal people protect and store their food before the days of refrigeration?
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2min
April 01, 2026 Earth Notes: Feeding Hummingbirds
April in northern Arizona is heralded by the loud metallic wing trills of broad-tailed hummingbirds returning from winter in the Highlands of Mexico and Central America.
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2min
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

FAQs about Earth Notes:

How many episodes does Earth Notes have?

The podcast currently has 72 episodes available.