Salt deposits on Mars

New York Times: Mikki M. Osterloo of the University of Hawaii and colleagues have found evidence of chloride-bearing materials — in other words, salts — in the Martian southern highlands. The deposits are small and in some cases are fractured into polygonal shapes, suggesting that they consist of salts that precipitated out of saline water as it evaporated, which is how salt flats form in deserts on earth.