New molecular robot can be programmed to follow instructions

New molecular robot can be programmed to follow instructions: "Scientists have developed a programmable 'molecular robot' -- a sub-microscopic molecular machine made of synthetic DNA that moves between track locations separated by 6nm. The robot, a short strand of DNA, follows instructions programmed into a set of fuel molecules determining its destination, for example, to turn left or right at a junction in the track. The report represents a step toward futuristic nanomachines and nanofactories."