About ten years ago I was an electrical engineering intern at MDA Space Robotics. They are the company that designed the Canadarm 1 and 2 used on the International Space Station. I still remember meeting the R&D team next door to see their demo of a 3D LIDAR system mounted on a Mars Rover model. It was one of the competing designs to serve as the eyes of the rover. To put this into perspective, this was at a time when a single-beam scanning laser was common on a robot to gauge distances. Seeing a vision system which can generate 3D polygons of the terrain in real-time for navigation was just unbelievable.