Neutrinos, previously thought to be massless have been observed in a new way that tells scientists there are probably three times as many emitted form the Sun as previously believed and that they may change from one type to another before reaching Earth.

Interesting numbers - three varieties of neutrino, and equal numbers of each variety arrive here. Perhaps they are in some kind of random quantum state until observed? The articles, at Cosmiverse, BBC, Unisci and AlphaGalileo, don't mention any explanation of what causes the neutrinos to change...

This also means that the Universe just got heavier