An interdisciplinary study of the diverse life in the soil beneath our feet that includes bacteria, fungi, protists, nematodes, arthropods, invertebrate, viruses, and the essential functional roles these organisms contribute to sustainability of the planet. Repeatable one time. Pre: 375 or TPSS/PEPS/SUST 371, or MICR 351, or consent. (Cross-listed as TPSS 480)