These humble cell folks are pretty complex in their own way. They come in many, many shapes. They live in every nook and cranny all over the world. Scientists call them bacteria. Sometimes they get a bad rap.
Many people only think of bacteria as bad cells.
But, the truth is, most do wonderful things for the whole planet, people included. He takes all that organic material that falls on the ground and breaks it down into small enough pieces for plants to take in through their roots. He does a wonderful job, too. It's hard to see Simon, but without him, you wouldn't be able to see all those plants everywhere. Just inside of that, he has a membrane that keeps his insides inside and his outsides outside.