Right under the Central Valley, there are vast ancient river beds, cut by glaciers thousands of years ago. Erica Geis wrote about ancient aquifers for Bay Nature magazine. 

<p>Right under the Central Valley, there are vast ancient river beds, cut by glaciers thousands of years ago. Erica Geis wrote about ancient aquifers for Bay Nature magazine.&nbsp;</p>

KQED serves the people of Northern California with a community-supported alternative to commercial media. We provide citizens with the knowledge they need to make informed decisions; convene community dialogue; bring the arts to everyone; and engage audiences to share their stories.

<p>KQED serves the people of Northern California with a community-supported alternative to commercial media. We provide citizens with the knowledge they need to make informed decisions; convene community dialogue; bring the arts to everyone; and engage audiences to share their stories.</p>

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