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"Bathtub Ring" is New Evidence for an Ancient Ocean on Mars
April 15, 2026
PASADENA, California, April 15 -- The California Institute of Technology posted the following news:

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"Bathtub Ring" is New Evidence for an Ancient Ocean on Mars

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Caltech researchers have identified geological features on Mars that could point to the existence of a long-dried ocean that once covered a third of the Red Planet's surface.

The research was conducted by former Caltech postdoctoral scholar Abdallah Z . . .

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