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In the trenches  (Source: NASA)
The NASA Phoenix Mars Lander may have found ice

The NASA Phoenix Mars Lander has reportedly found dice-sized ice crumbs that may have melted after being uncovered more than four days ago.  As Phoenix dug around and took images of the Martian soil, scientists noticed several small cubes that vanished over a span of a several days.

"It must be ice," said Phoenix Principal Investigator Peter Smith of the University of Arizona, Tucson. "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."

The possible ice was found in a small trench, "Dodo-Goldilocks," which was made larger by a robotic arm on Phoenix.  

Working in a different trench nearby, Phoenix's arm found a hard surface that could be an icy layer, as scientists continue to try and determine if Mars could have been suitable for life.

Scientists have long debated amongst themselves as to whether or not the Red Planet of Mars had signs of liquid ice - one of the main goals of the Phoenix mission.  In 2002, the NASA Mars Odyssey was used to discover a permanent ice cap at the Martian north pole, with scientists believing a larger amount of ice is directly underneath the planet's surface.

NASA's next goal will be to try and collect samples of the water so instruments aboard Phoenix will be able to examine it.  A drill on the robotic arm could be used to break a small sample of the hard surface so it can be transferred to one of Phoenix's ovens.  

The discoveries come one day after Phoenix lost a day of productivity because of a glitch in which Phoenix's computer memory was full of the same image mistakenly copied repeatedly.  Engineers will send a patch over the weekend to make sure the same mistake does not happen again.

The Phoenix lander arrived on Mars on May 25 and is almost one month into a scheduled 90-day mission.

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Ice on Mars?
By Enterprise on 6/20/2008 1:17:37 PM , Rating: 2
Question. As cold as it is suppose to be on the surface where Phoenix is, how could the ice, if it were of similar composition to our ice here on earth,melt. Perhaps it is of some other compostion with a lower melting point.

RE: Ice on Mars?
By Rugar on 6/20/2008 1:30:57 PM , Rating: 2
I think it's more likely that they use "melt" because most people wouldn't understand "sublimate".

RE: Ice on Mars?
By JediJeb on 6/20/2008 4:58:42 PM , Rating: 2
The lower the atmospheric pressure, the lower the temperature at which ice will melt, so it is entirely possible. Also as someone else said, it could have sublimated at such low pressures too.

RE: Ice on Mars?
By dragonbif on 6/21/2008 12:57:23 AM , Rating: 1
Never heard of permafrost??? In Alaska you dig 2 feet into the ground and you find it is frozen even though it is 80-90 digress out in the middle of summer. Let it sit exposed for a day or two and you can dig another foot yay.
Just for you info to you can look it up...

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