This photo taken on Nov. 23, 2024 shows the acrylic sphere of the central detector of the Jiangmen Underground Neutrino Observatory (JUNO) being cleaned in Jiangmen, south China's Guangdong Province. The main part of the central detector has been constructed recently. As one of the world's most powerful experiments to uncover neutrino mystery, JUNO is expected to operate for at least 30 years. (Xinhua/Jin Liwang)
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