Soil also gets a closer look, since it makes a great place for digging holes and a lot of other surprising activity. For many animals, a simple hole is home sweet home. Holes provide shelter for many kinds of animals, from swarms of insects to hibernating mammals. Animals may dig their own holes or borrow holes made by others. They may use natural cavities or spaces within trees, rocks or other places.
Some animals even move into holes inside human dwellings.
Animals may use holes for temporary shelter, to bear young or to live in year-round. View full text of this story. It's a combination of organic and inorganic material that comes in a variety of colors and textures. Soil supports plant life and shelters numerous underground animals. Things live, die, rot and change form among its depths.