A few days ago, many media reported that the NASA space agency is preparing to make a stunning announcement about a new historical discovery on Mars, which should be included in the "history books".
True, in an interview given by John P. Grotzinger, a representative of the NASA space agency (NASA), there is no specific information, however, John P. Grotzinger in his interview made a reservation that the Curiosity rover found on Mars, previously unknown minerals there, probably calcium carbonate (CaCO3), which on Earth is very often found in the shells of marine animals and their debris, and is called shell rock (shell rock).
Therefore, it is possible that the Curiosity rover could find a fragment of a sea shell on Mars, which may indicate the existence of complex biological life on Mars at that distant time when there was water. On December 3, 2012 at the American Geophysical Union (AGU) conference in San Francisco, NASA scientists plan to announce a find on Mars.