“It’s an interesting problem because we still don’t actually have an explanation for what those anomalies are, but what we do know is that they’re most likely not representing neutrinos,”
NASA’s ANITA balloon picked up radio pulses coming up out of the Antarctic ice at an angle physics cannot explain. To get there, the signal would have crossed thousands of kilometers of rock. Fifteen years of Pierre Auger data show nothing similar. The new physics angle is effectively dead, and nobody has an answer.