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Intriguing signals with excesses over expected backgrounds have been observedin many astrophysical and terrestrial settings, which could potentially have adark matter origin. Astrophysical excesses include the Galactic Center GeVgamma-ray excess detected by the Fermi Gamma-Ray Space Telescope, the AMSantiproton and positron excesses, and the 511 and 3.5 keV X-ray lines. Directdetection excesses include the DAMA/LIBRA annual modulation signal, the XENON1Texcess, and low-threshold excesses in solid state detectors. We discuss avenuesto resolve these excesses, with actions the field can take over the nextseveral years.

Snowmass2021 Cosmic Frontier White Paper: Puzzling Excesses in Dark Matter Searches and How to Resolve Them