Dr. Phillip Barak, Associate Professor of Soil Science at the University of Wisconsin-Madison, has put together this "web-based focal point and resource for 3-D visualizations of molecules and minerals." A collection of 3-D, interactive models of molecules and minerals, these detailed, color images and animations are designed for instructors and students alike. Visualizations include soil organic matter; phosphates; pesticides, herbicides and contaminants; and sulfides. Each is supplemented by information about molecular structure and guides to further information.