This thought-provoking collection will evoke a sense of wonder and awe in readers, as they discover the mysterious world underneath us. Kids will explore everything from animal burrows, to human creations -- like subways -- to ancient cities and fossils. Even deeper down, there are caves, magma, and Earth's tectonic plates. The illustrations show how girl and boy, accompanied by several animals, go on a fantastic underground journey. In these poems, young readers will see that beneath us are the past, the present, and the future.