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The LUX-ZEPLIN experiment, located nearly a mile underground in South Dakota, searches for dark matter using a detector filled with ultrapure liquid xenon. In an analysis of 220 live days of data, researchers found one particle interaction that did not match their models of ordinary background events. The signal is consistent with a possible collision involving a weakly interacting massive particle, or WIMP, but alternative explanations remain open. Its statistical significance is 2.6 sigma, corresponding to roughly a 0.5 percent probability that known background processes could produce such an event. Particle physicists generally demand 5 sigma before announcing a discovery, so a single unusual interaction is not sufficient evidence. Detailed simulations were essential because they established what signals the detector’s materials and ordinary particles should create. The experiment is expected to continue through 2027 and gather 1,000 live days of data, allowing scientists to see whether the hint strengthens, reveals an overlooked background source or disappears as a fluctuation.