  Intense neutrino beams that accompany muon colliders can be used for
interstellar communications. The presence of multi-TeV extraterrestrial muon
collider at several light-years distance can be detected after one year run of
IceCube type neutrino telescopes, if the neutrino beam is directed towards the
Earth. This opens a new avenue in SETI: search for extraterrestrial muon
colliders.
