Worm Gear

Worm gears. Why are they called worm gears?  They don't even look like worms. I have a lot of Lego worm gears. They are cool. They look like they are moving inward, but they're just spinning. As you can see, the worm gear is like a spiral. A spinning spiral. It is actually called the archimedes screw. But it's a little bit smaller. You can see it under the Lego 24 tooth gear. The 24 toothgear can't spin, only the worm gear can. That is because, if the gear did spin, that would push the worm gear. I like the way it looks like it is moving. The way it looks like it is disappearing into the edge. I think that is why it is called the worm gear. Because it looks like a worm on the outside keeps on spinning in to a hole. It goes on non-stop, so it seems like the worm is really long. Or going on forever. I think that is why it looks so cool.