Expertise derived from working on the joint NASA-ESA Cassini-Huygens mission to Saturn and its moon Titan is now being applied to underground drilling machines. This is providing tunnelling engineers with an improved ability to virtually ‘see’ some 40 metres into solid rock and pinpoint obstacles ahead.
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http://www.esa.int/export/esaCP/SEMCJSXO4HD_Improving_0.html