Soil may not be alive, but amazingly, multitudes of microscopic creatures live there, battling it out in an eat-or-be-eaten world. These tiny creatures, invisible to our eyes, provide food for the insects that in turn feed the reptiles and mammals that live in and above the soil. You'll never look at the ground you walk on in the same way after Raymond Bial, an award-winning photo essayist, takes you on this eye-opening, down-and-dirty tour of one of the earth's most precious resources.