Cosmology is entering a new era as the number and precision of probes perpetually increase. Long-standing probes, such as the cosmic microwave background (CMB) and galaxy surveys, are cultivating high-precision tests for a wide array of cosmological models. Gravitational waves (GW), line-intensity mapping (IM), and other more recent probes are beginning to yield intricate astrophysical information about the creation of their distinct signals. In the upcoming decade, potential probes, such as active galactic nuclei (AGN) and neutrinos, will see favorable improvements in their characterizations. My research interests span across the various theoretical analyses of these types of probes, as each reveals a unique and complementary slice of information about the Universe. These slices, together, further complete a picture of the entire Universe, as well as cross-check the conclusions drawn from any single probe. Thus far, I have tested astrophysical and inflationary signatures with CMB secondaries; constrained dark matter and the anomalous EDGES signal with IM; characterized AGN variability with time-domain astronomy; and investigated the nature of astrophysical neutrinos with optical and neutrino telescopes
