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This Green Earth

This Green Earth | September 2, 2025

By Claire Wiley,

Chris Cherniak

Published August 31, 2025 at 7:10 AM MDT

Ways To Subscribe

Biologist and author Karen Lloyd shares a firsthand account of the hunt for life beneath Earth’s surface in her newest book, "Intraterrestrials: Discovering the Strangest Life on Earth." (01:25)

Geoscientist and author Marcia Bjornerud talks about her new book "Turning to Stone," which reveals how rocks shape our lives and sustain the planet. From aquifers that purify drinking water to basalt that regulates climate, she shows how rocks are the hidden infrastructure of Earth. (22:25)

This Green Earth

Claire Wiley

Claire is the producer and co-host of This Green Earth and a volunteer DJ on Tuesdays from 10 a.m. to 3 p.m.

See stories by Claire Wiley

Chris Cherniak

Chris is the co-host of “This Green Earth”, a weekly radio show covering environmental news and issues. Broadcast on KPCW, the NPR affiliate for Park City. He also sits on the boards of Recycle Utah and Summit Community Power Works.

See stories by Chris Cherniak