Photo: Weird Mars Deposits Could Be Vast "Ice Cap" at Equator

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A topographic image of the Martian equator shows the Medusae Fossae Formation along the divide between the planet's highlands and lowlands.

New radar data from the hilly formation show that it is covered with unusual sediments that scientists say could be a huge amount of water ice—or just dry, low-density deposits.

Image courtesy ESA/ASI/NASA/Univ. of Rome/JPL/Smithsonian

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