[Huebolt]

Strange indeed. A quick check shows neutrinos to be both massless and yet travel at the speed of light. At the same time, they must have mass in order to oscillate their flavor. Neutrino flux also affects the decay rate of isotopes - the half life used for carbon dating for instance. That blows up that technique for dating past events. Bottom line, the more they know, the less they know about it.

Special department of unobservable phenomenon kudos here.

[Gadsden1st]

This “travel at the speed of light” thing. The red shift is used to measure distances right? That means infrared must travel at a different speed than ultraviolet, and that is not getting into the other parts of the electromagnetic spectrum like x-ray or gamma rays. So what does speed of light mean since all the frequencies travel at different speeds? Maybe we could travel at the speed of red light and still not have infinite mass?