According to Peter Smith, the mission's principal investigator - this photo is taken before and after by NASA's Mars Phoenix Lander show "perfect evidence" of water ice on Mars.
The dice-size crumbs of bright material seen in the bottom left corner of the so-called Snow White trench in the left image, taken June 15, appear to have vanished by the time the right image was taken, on June 19.
Scientists are convinced the material was frozen water that vaporized after the lander's robotic arm dug up the material.
FYI - Money And Nature
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