NASA
18th December 2015, 06:50
http://solarsystem.nasa.gov/images/news/pia20174-main_992ml04393zrsmos_24b_flt_3193.jpg (http://solarsystem.nasa.gov/news/2015/12/17/rocks-rich-in-silica-present-puzzles-for-mars-rover-team)17 Dec 2015 - Rocks Rich in Silica Present Puzzles for Mars Rover Team
NASA's Curiosity rover has found much higher concentrations of silica at some sites it has investigated in the past seven months than anywhere else it has visited since landing on Mars 40 months ago.
More... (http://solarsystem.nasa.gov/news/2015/12/17/rocks-rich-in-silica-present-puzzles-for-mars-rover-team)
NASA's Curiosity rover has found much higher concentrations of silica at some sites it has investigated in the past seven months than anywhere else it has visited since landing on Mars 40 months ago.
More... (http://solarsystem.nasa.gov/news/2015/12/17/rocks-rich-in-silica-present-puzzles-for-mars-rover-team)