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Scientists identify ancient Martian shoreline ring in northern plains.
New research published in Nature identifies a ring-like feature on Mars that likely marks the ancient shoreline of a vast ocean in the planet's northern plains.
The study, led by Caltech researchers, suggests this "bathtub ring" formed over millions of years as rivers deposited sediment, indicating a long-lived, wetter climate on the Red Planet billions of years ago.
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Los científicos identifican el antiguo anillo costero marciano en las llanuras del norte.