To any possible “data geek” on this forum: raw outputs from the Curiosity’s SAM dynamic spectroscope are far from giving directly the composition of the tested samples, so NASA organizes an open data-learning challenge - see: https://www.drivendata.org/competitions/93/nasa-mars-spectrometry/page/437/
You have one month to register, download the data, train and submit your results.
Enjoy!
Oops… you have TWO months left !