Scientists suggest this could indicate a much larger magnetic deflection than predicted, an unidentified source in the Local Void, or an incomplete understanding of high-energy particle physics.

“These events seem like they’re coming from completely different places in the sky. It’s not like there’s one mysterious source,” said Prof John Belz of the University of Utah and a co-author of the paper. “It could be defects in the structure of spacetime, colliding cosmic strings. I mean, I’m just spitballing crazy ideas that people are coming up with because there’s not a conventional explanation.”

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