Support WBURBig News From Mars? Rover Scientists Mum For NowPlay04:31Download AudioJoe PalcaNovember 20, 2012 ShareNASA's Mars rover Curiosity dug up five scoops of sand from a patch nicknamed "Rocknest." A suite of instruments called SAM analyzed Martian soil samples, but the findings have not yet been released. (NASA/JPL-Caltech)