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... but higher-energy objects are stopped by the Earth's mass.
Simple answer: they were WRONG about this bit...
The probability of neutrinos being absorbed by the Earth was consistent with expectations from the Standard Model of particle physics, which scientists use to explain the fundamental forces and particles in the universe. This probability—that neutrinos of a given energy will interact with matter—is what physicists refer to as a "cross section."
originally posted by: MichiganSwampBuck
Parallel lines never cross, neither do parallel universes. What ever happens in other hypothetical universes has nothing to do with this one.
Let us not forget that there were real, actual, papers written about `Oumuamua being an interstellar spacecraft.
but I couldn't glean why the particles and their properties were so strange and why the particles being from another universe but running backwards in time was even a first consideration as an explanation?
Oh well, it did make a headline and some conversation other than the end of all things, so good on them.