<ul><li>Sedimentary mineral deposits analysed by the Chinese Zhurong Mars rover appear to have been left by an ancient sea 3.5 billion years ago.</li><li>The rover landed on Mars in May 2021 and has been analysing deposits in the Vastitas Borealis, a low-lying plain in the northern hemisphere.</li><li>Researchers used elevation data and geochemical analysis to estimate surface ages and found features consistent with a nearshore zone and flooding about 3.68 billion years ago.</li><li>Future missions may be able to confirm the existence of the ancient Martian ocean.</li></ul>

Chinese Mars rover finds evidence of ancient sea’s shoreline

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