IceCube just announced its measurement of cross sections for high energy neutrinos interacting with ordinary nucleons. Nobody has been able to measure the rate for energies this high before--and the result looks pretty consistent with predictions.
You will probably have heard that neutrinos zip right through you without interacting--that you never notice them and never will. That's true for the most common varieties from ordinary radioactive decay. But higher energy neutrinos (very rare) interact more strongly, until at the level discussed in this paper, it is possible to tell the shadow of the Earth's core from the shadow of its mantle--with enough events. They're not quite so "ghostly" at these energies.
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