John P. Grotzinger
= John P. Grotzinger
{c}
{wiki}
Research author on <sedimentary deposits> and ancient Martian environments.
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{description=Christopher P. Michel (Cmichel67), 22 September 2026. https://creativecommons.org/licenses/by-sa/4.0/[CC BY-SA 4.0], via Wikimedia Commons.}
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