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That’s not Ralph’s dad in the picture… that’s Professor Ray Weiss. I know them both, and knew Dave Keeling as well.

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Correction: You are absolutely right. The web version of this article has been changed to show a photo of Ralph and Charles Keeling in 1989. Dr. Ray Weiss is Distinguished Research Professor of Geochemistry and Associate Dean Emeritus at the Scripps Institution of Oceanography.

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