The Santa Fe topical workshop for 2004 will concentrate on recent developments in cosmology, especially those related to current and expected observational advances, including the cosmic microwave background (CMB), large-scale structure, and dark matter and energy/early universe. The first two weeks will be devoted largely to structure formation and the CMB, while the last week will focus on dark energy. The format will emphasize discussion with some formal pedagogical review and related talks as appropriate. Generally speaking we would like to reserve the largest fraction of the day for discussion and informal meeting. To encourage this informality and discussion, attendance wil be limited to about 70 participants.

The workshop will be held at St. John's College, a pleasant and prestigious campus situated in the hills east of downtown Santa Fe. This meeting is part of a continuing series of workshops on cosmology co-organized by the Theoretical Division of Los Alamos National Laboratory and the Theoretical Astrophysics Group at Fermilab. The main sponsors of the meeting are the Institute of Geophysics and Planetary Physics at Los Alamos National Laboratory and the Center for Cosmological Physics at the University of Chicago. We also acknowledge support from the Theoretical Division at Los Alamos National Laboratory.