The Phoenix lander on Mars has begun its primary science mission. One element of that mission includes digging a trench into the Martian soil, looking for water ice or other evidence of past water. Just an inch or so down, it has uncovered a bright white layer – most likely either water ice or salts deposited by evaporating water (clearly visible in the photo at right). Further investigations will determine which it is. In either case, it's what the scientists sent Phoenix to Mars to find, so they are elated with this early success.You go, little lander!
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