Peanut probe part of NASA mission

(AP) -- Tim Williams' goal was to create a device to test soil moisture around peanut pods, but his modest invention is now helping probe the soil of the Red Planet for traces of water.

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<p><a href="http://www.physorg.com/news133006418.html">Peanut probe part of NASA mission</a></p> <p>(AP) -- Tim Williams' goal was to create a device to test soil moisture around peanut pods, but his modest invention is now helping probe the soil of the Red Planet for traces of water.</p>