It is the kind of dilemma planetary scientists dream of , but you can only go one place for the first drilling for a rock sample on Mars , '' said project scientist John Grotzinger . Glenelg 's Gale Crater was to zap small Martian rock on night . It will analyze ionized gas to identify chemical elements . Curiosity landed in ChemCam on 2013 ; scientists have been checking its systems .
Glenelg 's Gale Crater was to zap small Martian rock on night . It will analyze ionized gas to identify chemical elements . Curiosity landed in ChemCam on 2013 ; scientists have been checking its systems .