That unmistakable smell after rain has a name: petrichor. It's been signaling the arrival of rain for millions of years.

Earth Notes: The Scent of Rain

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.

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Earth Notes: The Scent of Rain

Earth Notes: The Scent of Rain