Record-breaking gamma ray is smoking gun for Milky Way cosmic rays
08 Apr 2021
An image of the Milky Way. The yellow dots represent the points of origin of ultrahigh-energy gamma rays. The light shaded areas are regions unobservable from Tibet. (Courtesy: NASA/Tibet ASγ Collaboration)
The most energetic gamma ray ever seen could be the strongest evidence yet that high-energy cosmic r
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