A diverse group of microbiologists, molecular biologists, chemical engineers, and geologists met in Bath, United Kingdom, in September 1993 to reach across the barriers separating their disciplines and report new findings in the expanding field of geomicrobiology. The occasion was the second International Symposium on Subsurface Microbiology, cosponsored by the Subsurface Science Program of the U.S. Department of Energy. Historically, Bath was a resort centered around the emission of thermal waters credited with the potential to cure numerous ills. The location was appropriate given that biotechnology appears to have considerable potential to cure some challenging environmental ailments.