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HiPOD 28 Sept 22: The Ever-Changing Swiss Cheese of Mars
Mars has a small South Polar cap of carbon dioxide ice. Although this cap persists year round, it is always changing: it has pits and mesas that in some places resemble a slice of Swiss cheese. The pits are expanding because the carbon dioxide is sublimating, but in other places new carbon dioxide deposits are building up on flat ground.
More: https://uahirise.org/hipod/ESP_074829_0945
NASA/JPL-Caltech/UArizona
