Mud on Mars?
These photos, according to a National Geographic article online, are what seem to be moisture condensing on a leg of the Mars Phoenix Lander, which is near Mars' North Pole:This substance is probably saline mud that splashed up as the craft landed, study leader and Phoenix co-investigator Nilton Renno of the University of Michigan told National Geographic News.
Salt in the mud then absorbed water vapor from the atmosphere, forming the watery drops, Renno said.
The water can stay liquid even in the frigid Martian arctic because it contains a high amount of perchlorates, a salt "with properties like the antifreeze used to melt snow here in Michigan," said Renno, who will present the work next month at the 40th Lunar and Planetary Science Conference.
Finding liquid water under these conditions carries possible implications for Mars's habitability, the scientists say.