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Scientists Link the Formation of the “Knee” to Black Holes

Summary by SciencePost
For decades, astrophysicists have been trying to explain a strange phenomenon observed in cosmic rays: a sudden drop in their intensity to 3 PeV, an extremely high energy. This “knee”, as it was nicknamed, remained mysterious. Supernovae, long considered to be the main sources of these particles, did not seem powerful enough to reach [...]
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For decades, astrophysicists have been trying to explain a strange phenomenon observed in cosmic rays: a sudden drop in their intensity to 3 PeV, an extremely high energy. This “knee”, as it was nicknamed, remained mysterious. Supernovae, long considered to be the main sources of these particles, did not seem powerful enough to reach [...]

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SciencePost broke the news in on Sunday, November 23, 2025.
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