When you look at a worm you don't think wow what a lot of legs but unbeknownst to you they do have a lot of rather wonderful legs. If you look at a worm under a microscope you will see lots of legs around their bodies, called setae, which help the worm to move along. The incredible thing about these legs is that they can be pulled in and out by the worm. Poking the setae out into the soil at the tail end anchors the worm, whilst its muscles push it forward. They can then be poked out at the head end, anchoring the worm whilst it waits for the tail end to catch up.