AdvertisementBig News From Mars? Rover Scientists Mum For Now04:31Download AudioResumeNovember 20, 2012Joe PalcafacebookEmailNASA'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)