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Maven is the Mars Atmosphere and Volatile EvolutioN spacecraft, and it arrives in Mars orbit in just a few weeks. It’s purpose is to collect data that will allow researchers to figure out how Mars went from a warm wet world just like Earth to the cold, dry globe it is today. This could be very useful knowledge if we want to keep the same thing from happening to our planet. The non-NASA home page for this project is the Laboratory for Atmospheric and Space Physics at the University of Colorado, Boulder.