NASA has a new idea for a lunar rover, but the vehicle itself is already familiar. During a June 30 Moon Base update, the agency unveiled PROMISE – the Polar Rover for Observation, Mapping, and In-Situ Exploration. The proposed rover mission began life as an Earth-based engineering testbed at NASA’s Jet Propulsion Laboratory in Southern California, and is being studied to see if it can be modified to survive on the Moon.