This photo shows the central detector of the Jiangmen Underground Neutrino Observatory (JUNO) under construction in Jiangmen, south China's Guangdong Province, Oct. 9, 2024. China has constructed the world's largest transparent spherical detector 700 meters underground to capture elusive neutrinos, often dubbed "ghost particles," to unravel the secrets of the infinitesimally small and the infinitely vast in the universe. (Xinhua/Jin Liwang)