Just like helicopters mimic dragonflies, the plow is a modern variation of the earthworm. (So much in nature goes on above our heads, and below our feet.) With their digging and digesting, earthworms make it possible for us to grow food.
Charles Darwin studied earthworms for decades and wrote his final book about them. He said, “It may be doubted whether there are many other animals which have played so important a part in the history of the world, as have these lowly organized creatures.”
Darwin discovered that to block out the chill, earthworms drag leaves into their tunnels pointy-end first - an efficient and intelligent hauling strategy. He also learned that given a choice, they particularly liked carrots.