Luigi the poopbot set to scour sewers and analyse human waste for viruses

Below the bustling streets of Cambridge, Massachusetts, Luigi is sifting through human waste and gathering data on some 107, 000 people. The smart bot is part of an MIT project to analyse human waste - and could track the health of a city. Luigi (pictured) is a robot in MIT's latest project that focuses on bacteria, viruses and chemical compounds found in the human stomach. Luigi spends about an hour or two inside each sewer and collects samples as the float by. The machine is fitted with ultrasonic sensors, which helps the cylindrical robot hover 40 centimeters above its target.