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Scientists in China have almost finished building a massive underground detector to sniff out mysterious particles called neutrinos. Neutrinos are tiny, cosmic particles with a mind-bogglingly small mass, but they're found all around us. Researchers want to study them to get a clearer unders… The $300 million detector is seen Oct. 11 at the Jiangmen Underground Neutrino Observatory in Kaiping, China. Workers labor Oct. 11 on the underside of the cosmic detector at the Jiangmen Underground Neutrino Observatory in Kaiping, China. Workers labor Oct. 11 on the underside of the cosmic detector at the Jiangmen Underground Neutrino Observatory in Kaiping, China. Wang Yifang, chief scientist and project manager at the Jiangmen Underground Neutrino Observatory briefs visitors Oct. 11 on a photomultiplier tube used to convert photons into electrical signal, of which 20,000 pieces are used in the cosmic detector at the facility in Kaiping, China.
