A half-scale version of the ExoMars rover, called ExoMars Testing Rover (ExoTeR), seen manoeuvring itself carefully through the red rocks and sand of 9x9 m Planetary Utilisation Testbed, part of ESA’s Planetary Robotics Laboratory in its ESTEC technical centre in the Netherlands, as a test of autonomous navigation software destined for ESA’s ExoMars 2020 mission to the Red Planet.