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White and green electromagnetic detectors surround mounds of dirt covering instruments to detect muon particles originating from outer space at the Large High-Altitude Air Shower Observatory (LHAASO) at Haizi Mountain, near Daocheng in southwestern China's Sichuan Province, Friday, November 8, 2019. The LHAASO, the biggest device of its kind, has detected a dozen sources of ultra high-energy gamma rays from within our Milky Way galaxy, according to a new study in the journal Nature. (Photo by Mark Schiefelbein/AP Photo)
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