Earth Notes

Earth Notes

KNAU Arizona Public Radio

Episodes 20
Avg. Duration 2m
Activity Highly Active
Since Oct 2025
Latest Episode Mar 2026

Publishing Details

Schedule
Weekly
Format
Episodic
Consistency
84%
Hosting
www.knau.org

Contact & Outreach

About This Podcast

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 wrapped in human interest, the two-minute-long segments encourage listeners to think of themselves as part of the solution to environmental problems.

Explore Statistics

Recent Episodes

Earth Notes: 1-17 Wildlife Crossing

Mar 11, 2026 2m

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.

Earth Notes: The Legacy of Hat Ranch

Mar 04, 2026 2m

Hat Ranch near Williams, Arizona has a layered history of conservation and public life.

Earth Notes: Cottonwood Leaf Cooling

Feb 25, 2026 2m

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.

Earth Notes: Signs of Passage on Route 66

Feb 18, 2026 2m

Route 66 is known for roadside history, but the landscape also holds older signs of passage and human movement.

Earth Notes: Why Night Lighting Draws Winged Insects

Feb 11, 2026 2m

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.

Earth Notes: The Ghostly Glow of Gegenschein

Feb 04, 2026 2m

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.

Earth Notes: Coyote-Badger Cooperative Hunting

Jan 28, 2026 2m

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.

Earth Notes: The Future of Saguaros

Jan 21, 2026 2m

Saguaro survival is now being challenged at all elevations by climate change.

Earth Notes: Ancestral Pueblo Water Conservation

Jan 14, 2026 2m

Ancestral Puebloan peoples developed ingenious methods to collect, store, conserve, and utilize water.

Earth Notes: Climate Clues in a Grand Canyon Cave

Jan 07, 2026 2m

The marvels of the Grand Canyon extend beyond its dramatic scenery. Underground, vast cave systems hold clues to the region’s future climate.

Earth Notes: Turkey Feather Blankets in the Ancient Southwest

Dec 31, 2025 2m

Ancestral Pueblo people began making turkey feather blankets about 1,800 years ago, coinciding with the transition to settled agricultural life.

Earth Notes: The Surprising Story of House Finches

Dec 24, 2025 2m

House finches are a familiar sight in northern Arizona, but their path to the West is a story of human introduction and adaptation.

Earth Notes: Cactus Microchips

Dec 17, 2025 2m

Some things can only be found if you know exactly where to look. The Peebles Navajo Cactus, at less than 3 centimeters tall, doesn’t seem to want to be found. Its thorny spines mimic surrounding grit…

Earth Notes: Aeroecology of Condors

Dec 10, 2025 2m

A new study on the condor has revealed fundamental new insights into the lives of these critically endangered bird of prey.

Earth Notes: Non-Toxic Rodent Control

Dec 03, 2025 2m

As winter sets in, rodents seek warmth and food — often in our homes. There are non-toxic ways to control them, from rodent birth control to attracting natural predators.

Earth Notes: Chino Valley’s Fred Harvey Farm

Nov 26, 2025 2m

A historic Chino Valley farm that supported Fred Harvey’s railroad dining empire over a century ago is on track to become part of a new state park.

Earth Notes: The Hartley Mammoth Site

Nov 25, 2025 2m

In 2013, hiker Gary Hartley stumbled upon the fossilized remains of two mammoths in the Rio Puerco Canyon on the Colorado Plateau in northern New Mexico.

Earth Notes: Clovis Culture and Megafauna

Nov 12, 2025 2m

The Clovis people hunted mammoths and other Ice Age giants more than 13,000 years ago. Archaeologists are uncovering what happened when those animals disappeared.

Earth Notes: Clovis Culture

Nov 05, 2025 2m

The Clovis people hunted mammoths across the Southwest more than 13,000 years ago. Archaeologists are still uncovering what their tools and camps reveal.

Earth Notes: Spiders That Hear Through Their Webs

Oct 29, 2025 2m

Some spiders don’t just spin webs — they listen through them. Researchers found that orb-weavers can sense vibrations on their silk to detect prey and danger.

Frequently Asked Questions

How many episodes does Earth Notes have?

Earth Notes has published 20 episodes since October 2025, covering topics in Nature, Science.

Is Earth Notes still active?

Earth Notes is currently highly active with new episodes weekly. Average episode length is 2m.

How do I contact Earth Notes for sponsorship or guest appearances?

Sign up on Grep.FM to access contact details for Earth Notes, including email and social media links.

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