theotherguy
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Scientists working on NASA's Phoenix Mars Lander mission are reporting what they call compelling evidence that the robot craft has found ice while digging on the Martian surface.
Small chunks of bright material described as the size of dice have disappeared from inside a trench where they were photographed by the craft earlier this week, NASA said in a statement late on Thursday.
This has convinced scientists the chunks were ice -- frozen water -- that vaporized after digging exposed it, NASA said.
"It must be ice," said mission principal investigator Peter Smith of the University of Arizona. "These little clumps completely disappearing over the course of a few days. That is perfect evidence that it's ice. There had been some question whether the bright material was salt. Salt can't do that."
Source:
http://www.sciam.com/article.cfm?id=nasa-craft-finds-evidence
This means a few things:
1. Water ice is evidence that water may have flowed over the surface of mars in the distant past.
2. Water ice this close to the surface suggests large deposits of permafrost just beneath the surface.
3. Ancient microbes might be encased in ice beneath the surface for study.
4. Future astronauts will be able to land at a site like this and harvest the ice for water and rocket fuel.