The field of relativistic heavy ion physics has seen significant advancement
in the new millennium toward a greater understanding of QCD at high
temperatures with the commissioning and operation of the Relativistic Heavy Ion
Collider. Here we review progress in the field as presented in a set of
lectures at the Lake Louise Winter Institute on Fundamental Interactions in
February 2004.Comment: 30 pages, 17 figures, Lake Louise Winter Institute on Fundamental
Interactions 2004 conference proceeding