Institute for Advanced Study
In spite of their dominance over the matter budget in the universe, particle constituents of dark matter have eluded detection and characterization to the present day. I will start with a short overview of the potential and limitations of direct-detection experiments, motivating a wide synergistic search that looks for the new particles both locally and in the early universe. I will then focus on cosmological constraints on dark matter interaction physics and present the first complete limits on the effective theory of sub-GeV dark matter using cosmic-microwave-background measurements. I will conclude with forecasts for upcoming and future cosmological surveys.