For three years or so, a gadget at CERN has been sending muon neutrinos to Gran Sasso which is 730 km away. No, the source of the muon neutrinos has been something else than the LHC - a device that has suffered from the first big power cut since the bird attack by a baguette on Friday.
The neutrinos had to travel through the Earth (the maximum depth is 11.4 km) but they don't mind. ;-)
Today, the OPERA Collaboration in Gran Sasso in Central Italy and CERN announced the first ever detection of a tau neutrino created by muon-tau neutrino oscillations:
In Gran Sasso, it collided with some matter, exchanged charge with it via a virtual W-boson, and became a charged tau lepton which is traced by scintillators.
It has been known for decades that neutrino oscillate - see e.g. my 1998 lectures on neutrinos (Majorana vs Dirac) that discuss the oscillations on pages 12-13. But it was easier to argue that the oscillations had to occur because of lost particles: newly created unusual species of particles are always harder.
Wait for some time or go to YouTube for the video. Double-click for full screen.