KGNU - How On Earth

Updated: 22 Dec 2025 • 747 episodes
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The KGNU Science Show

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In this week’s show Beth speaks with science writer, educator, and scientist Dr. Lisa Gardiner about her recent book Reefs of Time: What Fossils Reveal about Coral Survival. Lisa studied the fossil remains of ancient coral reefs, which also suffered from environmental challenges. In our conversation, you’ll hear about

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16 Dec 2025 • EN

Wind: It’s Past & Future

The Force of Wind (start time: 7:10)  For those living here on Colorado’s Front Range, you’ve likely had close encounters with wind — whether you’ve witnessed in fear branches snapping off trees in a windstorm, or simply looked up to marvel at the UFO-like lenticular cloud formations created by fast westerly winds. Lov

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On today’s show, Beth speaks with award-winning science writer Jennifer Frazer about her upcoming book: The Slime Mold’s Guide to World Domination: A Natural Mystery. The book is a funny natural history of slime molds that’s also a mystery that asks: how can a giant crawling cell possibly be intelligent?” Jennifer has

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Critical Earth Minerals  Hiding in Plain Site – Colorado School of Mines professor Elizabeth Holley shares  how the US could break its dependency on critical earth mineral imports, and lead the world in environmentally safe ways to do it. Show Producer/Host/Engineer: Shelley Schlender Executive Producer: Beth Bennett

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Great Steam . . . from a Heat Pump (starts 1:00)  Time Magazine named CSU Engineer Todd Bandhauer one of 2025’s top climate innovators.   His heat pump makes steam better than fossil fuel steam boilers.  Interview thanks to Rocky Mountain Community Radio and Aspen Public Radio. CU-Boulder at COP30 Climate Conference  (

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The physiology of deciduous trees (start time: 11:09) For many people living in places with four distinct seasons, such as here in Colorado, a favorite pastime at this midpoint in autumn is watching the faded leaves fall from their branches, and listening to the crackling sound while raking up the dried leaves. In this

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