I'll bet you think that the earthworm is only good for fishbait. Well, think again. The earthworm is responsible for a lot of the things that help make our soil good enough to grow healthy plants and provide us food.
Worms help to increase the amount of air and water that gets into the soil.
They break down organic matter, like leaves and grass into things that plants can use. When they eat, they leave behind castings that are a very valuable type of fertilizer. Earthworms are like free farm help. Another interesting job that the worm has is that of making fertilizer. If there are 500,000 worms living in an acre of soil, they could make 50 tons of castings.