The Cosmic Ultraviolet Baryon Survey (CUBS) is a large HST Cycle 25 GO

program designed to map 'dark' baryonic structures in the crucial but

unconstrained epoch between redshift z = 0.4 and z ~ 2.  The CUBS

program aims to combine absorption-line spectroscopy of 15 UV-bright

QSOs at z > 0.8 with matching deep galaxy survey data.  This legacy

sample enables systematic studies of the co-evolution of galaxies and

diffuse circumgalactic and intergalactic gas at a time when the star

formation rate density undergoes its most dramatic changes, and

provide key insights into how galaxy growth is regulated by accretion

and outflows.  In this talk, I will show some of the first results

from the CUBS program.