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Inside the best dark matter detector ever built

By David Stock

Deep beneath the planet’s surface at the Sanford Underground Research Facility in South Dakota, scientists are waiting for something that may never happen – the interaction of weakly interacting massive particles, or WIMPs. This is LUX-ZEPLIN, the most sensitive dark matter detector on Earth.

WIMPs are a leading contender for dark matter and could answer one of the biggest mysteries in cosmology: where is the missing matter that makes up the universe? The detector is filled with 10 tonnes of ultra-pure liquid xenon and is so sensitive that even a single gram of dust would skew its results. A single collision could reveal what most of the universe is made of, or prove that decades of physics may be pointing us in the wrong direction.

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