NASA mission explores world's deepest sinkhole

A NASA-funded expedition, including researchers from Carnegie Mellon University’s Robotics Institute, will begin searching for the submerged bottom of Mexico’s El Zacatón sinkhole with a robotic submarine the week of May 14.

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<p><a href="http://www.physorg.com/news98368588.html">NASA mission explores world's deepest sinkhole</a></p> <p>A NASA-funded expedition, including researchers from Carnegie Mellon University’s Robotics Institute, will begin searching for the submerged bottom of Mexico’s El Zacatón sinkhole with a robotic submarine the week of May 14. </p>