A Starship Technologies commercial delivery robot navigates a sidewalk during a live demonstration in front of the headquarters of Metro AG in Duesseldorf, Germany, on Tuesday. The six-wheel electrical delivery robot, designed by Skype founders Ahti Heinla and Janus Friis, can autonomously navigate and carry a maximum load of 20 kilograms over a distance of 6 kilometers from its base station at a maximum speed of 6 km per hour.SD-Agencies