A new analysis has found that the shimmery radar signal interpreted as underground water on the red planet could also have been produced by geological layering. The researchers created simulated layers of water ice, carbon dioxide ice, basalt and atmosphere in a variety of configurations and thicknesses, each with properties that reflect radar pulses in specific ways. There’s just one catch: Mars is thought to be too cold for liquid water, even pressurized under layers of ice, and with a freezing point lowered by the presence of salts.Read Long Article
