'Bio-Bot' That Swims Like Sperm Is An 'Exciting Advance' In Self-Propelled Biological Robots [VIDEO]

Engineers are pioneering a new way to explore the viscous fluids of biological environments, like the inside of the human body, where microscopes are difficult to place. Called a "bio-bot," the microscopic biological machine swims like a sperm, is powered by heart cells, propelled by a tail and can navigate the aquatic world of micro-organisms on its own.