<ul><li>Each year, around the end of October, particle physics laboratories, universities, and institutions around the world celebrate Dark Matter Day.</li><li>The international celebration aims to shed light on the mystery of dark matter, which makes up approximately 25 percent of the missing mass and energy in the universe.</li><li>Scientists continue to search for dark matter using various experiments and tools, such as detectors, particle beams, and telescopes.</li><li>Dark Matter Day is sponsored by the Interactions Collaboration, an international community of particle physics communication specialists.</li></ul>

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