Neutrino beam from aliens

0803.0409v1.pdf (application/pdf Object)

Here's an interesting suggestion in a new paper on arXiv: maybe aliens use neutrino beams to communicate over interstellar distances, and these may be detectable at the IceCube neutrino detector in Antarctica.

For something even more out there, the paper has a footnote to a 2003 paper which speculates on the use of neutrino beams to disable nuclear weapons. The paper makes it clear this is not about to happen anytime soon, but it's pretty good fodder for a science fiction writer.