Neutrino oscillations confirmed (like you care? read on...)

So, "Researchers on the OPERA experiment at the INFN1's Gran Sasso laboratory in Italy today announced the first direct observation of a tau particle in a muon neutrino beam sent through the Earth from CERN2, 730 km away. This is a significant result, providing the final missing piece of a puzzle that has been challenging science since the 1960s, and giving tantalizing hints of new physics to come."
Anyway for a long time scientists knew that neutrinos (presumably massless particles and thus really really hard to detect and measure) were produced in great quantities in our Sun; but the amounts and ratios of the different kinds differed radically from what was predicted. A presumptive explanation was that some neutrinos changed type (from muon to tau neutrinos) due to an unknown and unexplained mechanism. On May 31 of this year, the 'oscillation' (change of type) of neutrinos was specifically observed and recorded, involving a wholly-muon-type neutrino beam fired from CERN in Switzerland to a detector in Italy.
The confirmation of this oscillation is signficant because the mainstream theory of  'how things are in the universe' and the most detailed, confirmed, measured and most predictive theory ever conceived by man and arguably mankind's greatest achievement -- the 'Standard Model' -- does not and cannot explain this. Neutrinos have always been considered 'massless' particles like photons, and the oscillation of such particles is prohibited in the Standard Model. So, our understanding of the universe and how it works, needs revision; this result and the revelations concerning the existence and effects of both 'dark matter' and 'dark energy' mean that the Standard Model needs to be redefined or replaced. The problem is, no one knows now what form or structure such a replacement might be. In the physics world, these are 'interesting times' indeed.