25 marzo 2015
Scientists have found fixed forms of nitrogen in Mars. This suggests that there may have been a nitrogen cycle sometime in Mars’ past. The detection has been verified through analyses of samples taken at three different points on Mars. Analyses are made by the instrument SAM (Sample Analysis on Mars) on board the unmanned rover Curiosity located on Mars.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/L9m9u0jqpBc/150325082341.htm
