Spiky Probe on NASA Mars Lander Raises Vapor Quandary

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Phoenix inserted the four needles of its thermal and conductivity probe into Martian soil during the 98th Martian day or sol of the mission and left it in place until Sol 99 (Sept. 4 2008). Image credit: NASAJPL-CaltechUniversity of ArizonaTexas AM U ...
Phoenix inserted the four needles of its thermal and conductivity probe into Martian soil during the 98th Martian day, or sol, of the mission and left it in place until Sol 99 (Sept. 4, 2008). Image credit: NASA/JPL-Caltech/University of Arizona/Texas A&M University
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(PhysOrg.com) -- A fork-like conductivity probe has sensed humidity rising and falling beside NASA's Phoenix Mars Lander, but when stuck into the ground, its measurements so far indicate soil that is thoroughly and perplexingly dry.


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