2001: A Mars Odyssey Spectrum

On 7 April, a probe will set out for Mars that could be pivotal in the search for water–and life–on the red planet. The 2001 Mars Odyssey orbiter will also be attempting to erase memories of the failure of the last two NASA missions to that destination. The Odyssey’s mission is to map the planet’s geology, paying particular attention to the role of water, both past and present.