I saw this video and several others like it, all claiming that the glowing substance created in the microwave is indeed plasma. To my (limited) knowledge on the subject, plasma is just an ionized/electrified gas. However, others say that there is no way the substance could be plasma, as real...
I've heard many people claim that the first law of thermodynamics proves that the energy/matter must always exist in some form or another, since it cannot be created or destroyed. This would mean that energy/matter had no beginning, and will have no end. Is this a valid claim? Or is there...