The Builders
Summary
This Radiolab episode from the spinoff series Terrestrials celebrates beavers as ecological engineers who mend the planet. Host Lulu Miller and producer Ana Gonzalez explore how beaver dams clean water, enrich soil, and create fire-resistant refugia, featuring stories of beaver restoration in New York’s Bronx River and California’s wildfire zones. With insights from writer Ben Goldfarb and researcher Dr. Emily Fairfax, the episode highlights how these creatures inspire hope and environmental healing.
Topics discussed
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Intro: Welcome to Terrestrials and the Beaver Theme Song
Beaver Biology: Iron Teeth and Dam Building Instincts
Why Beavers Build Dams: Safety from Predators
History: From Beaver City to the Polluted Bronx River
The Return of Jose: Cleaning Up the Bronx River
Ecological Benefits: Water Purification and Biodiversity
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Parachuting Beavers and Engineer Emily Fairfax
The Little Last Chance Beavers and the 2021 Wildfire
Fire Refugia: How Beaver Dams Create Safe Zones
Beaver Believers: Letting Nature Mend the World
The Badgers: Listener Questions on Beaver Facts
Outro, Credits, and Final Advertisements
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