Gravitational Waves from Compact Binaries in LIGO and Virgo's Third Observing Run*

The third gravitational wave catalog of the LIGO, Virgo, and KAGRA collaborations contains 90 gravitational wave candidates, as well as a large number of subthreshold candidates. This catalog is the culmination of the first six years of gravitational wave detections by these collaborations, and the signals contained in it have advanced our understanding of black holes, the nuclear equation of state, and stellar evolution. Observations of compact binaries with gravitational waves have provided new tests of fundamental physics and new cosmological probes. In this talk, I will review these observations and what they have taught us, focusing on recent discoveries from the third observing run such as the detections of neutron star-black hole binaries.