> What surprises me about this article is that catching neutrinos tunneling up through the earth is considered surprising. I had thought that neutrino detectors

> What surprises me about this article is that catching neutrinos tunneling up through the earth is considered surprising. I had thought that neutrino detectors generally caught just as many neutrinos from below as from above; the earth is essentially transparent to them. This is what I thought too, but apparently, the Earth is opaque to neutrinos at energies above 1 PeV. (That is, the Standard Model predicts so.) The article states "The particles had energies that were high enough for the Standard Model to prohibit that kind of careless disregard for matter". Although I think it could have been explained better, explanation is there.