Looking for Life in All the Right Places

The campaign of Mars exploration has progressed from fly-bys, to orbiters, to rovers with subsequent increases in fundamental understanding of our planetary neighbor. This progression of robotic missions has revealed epochs of Martian history, which transitions from a place in time that could have supported microbial life to the cold dry planet of today. We are on that Martian threshold and could discover whether life has existed on another planet in our solar system.