Brookhaven National Laboratory's Relativistic Heavy Ion Supercollider (RHIC) facility provides this information-rich Website about the physics and engineering of the world's newest and biggest particle accelerator. RHIC made news recently when it produced an ion collision similar to one that might have occurred during the universe's "big bang." Highlights of this site include a virtual tour with full color photos and animations that provide an atom's-eye view of the collider's interior (MPEG). Secondary school and college students will find the site's lessons about the physics of heavy ion supercolliding and the physics primer page especially informative. Descriptions of RHIC's ongoing experiments, equipment, environmental impact information, and a cool fact sheet are also featured. Be sure to visit the First Collisions page for information about the news-making experiment.