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![A recent measurement by the H.E.S.S. observatory of the energy spectrum of cosmic ray electrons shows surprising results. Credit: F. Aharonian et al. (H.E.S.S. Collaboration) [1]; NASA Goddard; adapted by APS.](https://nasaspacenews.com/wp-content/uploads/2025/01/HESS_Figure-360x180.webp)
