"We've explored the MFF again using newer data from Mars Express's MARSIS radar, and found the deposits to be even thicker than we thought: up to [2.3 miles] thick," said Watters in an ESA statement about the work. "Excitingly, the radar signals match what we'd expect to see from layered ice, and are similar to the signals we see from Mars's polar caps, which we know to be very ice rich."
"Dry material, no matter what it is, just doesn't fit," Smithsonian Institution senior scientist Tom Watters, the lead author of a new paper published in the journal Geophysical Research Letters, told New Scientist of the research. "We just can't come up with another material other than water ice that fits the electrical properties, that also has this layering that we're finding."
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