Funded by the National Science Foundation and the U.S. Department of Energy, "QuarkNet brings high school students and teachers to the frontier of 21st century research that seeks to research some of the mysteries about the structure of matter and the fundamental forces of nature." High school teachers and students can explore the Fermi lab through videos, images, activities, and other online...

This Topic in Depth begins with a Web site from the Stanford Linear Accelerator Center called Theory: Quarks (1). The one-page offering contains a basic explanation of what quarks are, their masses, and how they're known to be real. Critical words within the page, such as flavor and hadron, are linked to a handy online glossary of terms. The second site is presented by the Particle Data Group of...