Every time we come back from a robotics conference thinking, "Okay, that's it, people are out of ideas, there are no more unique ways of getting robots to move," someone comes along and proves us wrong with something completely unexpected and cool. More than once, that someone has been David Zarrouk, who came up with the world's fastest inchworm robot and this robot, which can drive forward and steer left and right using just one motor. In a paper recently published in the journal Bioinspiration & Biomimetics, Zarrouk describes his latest innovative robot: SAW, or Single Actuator Wave-like robot, "a novel bioinspired robot which can move forward or backward by producing a continuously advancing wave." As far as I can tell, real worms don't actually get around by doing the worm. The worm (the dance move, that is) is a large-amplitude continuously advancing sine wave, which is also how SAW moves.