Three members of the Valles Mariners Explorer Initiative swarm - a robot, a rover and a drone. Groups of these will allow a comprehensive exploration of the Martian surface in future.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/48213136@N06">DLR German Aerospace Center</a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/dlr_de/26787115763/">Roboter, Rover und Drohne - Der VaMEx-"Schwarm" zur Erkundung des Mars</a>