From the moment we're born, we learn to use and depend on our sense of touch to gain knowledge and understanding of the world around us. Today, it can also be exploited to understand scientific data. Rapid prototyping, or layered manufacturing (LM), is a mainstream technology in engineering product development, enabling engineers to create prototype parts from new designs before their organizations invest in final production. The Center for Visualization Prototypes (CVP) at Oregon State University (originally at the San Diego Supercomputer Center) uses LM technology to create 3D visualization hard copies, collaborating with geologists, astronomers, oceanographers, cartographers, biomedical researchers, chemists, and other scientists to enhance data understanding. During its 10 years of operation, it has fabricated more than 1,000 physical models, helping them visualize their data.