Gastrophysical Cosmology - Introduction and Overview -- Recent Results from Cobe -- The Formation of Galaxies -- Experimental Galaxy Formation -- Population Synthesis and Spectral Evolution of Galaxies -- Searching for Hidden Galaxies -- Panel Discussion: The Nature of High-Redshift Objects -- Galaxy Evolution as a Function of Environment -- Distant Galaxies: Evolutionary Clues -- Old, Red, and Dead Radio Galaxies at Large Redshift -- Primeval Galaxies, the IGM, and the QSO-protogalaxy Connection -- The Extragalactic X-ray Background (1 - 20 keV) -- The Evolution of the Intergalactic Medium and Lyman-Alpha Clouds: Comparison of Theories and Observations -- Properties of the Lyman ? Forest at High and Low Redshifts -- QSO Absorption Lines: Implications for Galaxy Formation and Evolution -- The Properties of Absorption-Line Selected High-Redshift Galaxies -- Molecular Gas and the Yield of Young Stars in Galaxies -- The Physical Interpretation of Morphology -- Mergers and the Origin of Early-Type Galaxies -- Intergalactic and Extended Atomic Gas -- Energy Input from AGNs -- Cooling Flows in Clusters of Galaxies -- Evolution of Clusters and the Intracluster Medium -- The Quasar Luminosity Function -- Galactic Superwinds -- The First Stars -- The Birth of Stars in Galaxies -- The First QSs and Their Influence on the Intergalactic Medium.