productiving more maps of these stars and their rotations and we are seeing increased number of black amount of dark matter and hopefully this increase will allow us to maybe detect it, actually detect either directly or indirectly the directly or indirectly the existence one way or another of dark matter. >> so nasa will attempt to land on mars. >> exactly. >> how exciting is the community about this and what is the hope we're going to learn from it? >> very exciting mission. it's a nasa mission with international collaboration, studying the inside of mars, to measure mars quakes and the heat inside of the planet. you know, going to mars is not easy. less than half of the probes the world has sent to mars don't make it, historically. and so they describe six or seven minutes of terror. that's because mars does have an