Brief text explores how soil is formed, its layers, and its importance as a natural resource that living things need to survive.

"Water and soil serve as important parts of the natural world, and without them, forests would cease to exist. How do these two essential parts of nature work together to keep animals and plants alive in forests?"--Provided by publisher.

Down where worms wriggle and microbes squirm, there's a whole world waiting to be discovered... Under Your Feet delves beneath the Earth's surface and explores the diverse wonders hidden there. Encounter creatures of the deep and marvel at the mind-boggling size of the humongous fungus--the biggest organism in the world. Learn how one handful of ordinary soil contains more organisms than there are people on Earth, and carry out experiments using dirt...