[url=http://www.huffingtonpost.com/2013/07/30/photons-last-quintillion-years-light-particles_n_3677220.html?utm_hp_ref=science]Article[/url]
If photons have mass, wouldn't that mean that the speed of light has to be re-worked?
[quote]Scientists generally assume photons do not break down, since they are thought to lack any mass with which to decay. However, while all measurements of photons currently suggest they have no mass, they might instead potentially have masses too small for current instruments to measure. [/quote]
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This makes more sense. If only we knew what implications this had for science.