Hello everyone, I just want to throw out a perhaps rehashed idea just to see people's opinions on the matter. Given Einstein's equation; E=MC^2 If matter could travel at the speed of light it would posses maximum kinetic energy; maximum energy or pure energy is a photon. Theoretically speaking, given light speed is achievable by matter and it reaches a state of maximum kinetic energy, at that current state it would be synonymous with pure energy or a photon. Could we say then matter and energy are equal through the medium of light speed? This is also backed by the decay of quarks into photon pairs and lesser quarks prompting the idea that fundamental particals are comprised of pure energy/photons. Since a sudden decay or loss of energy produces photons, wouldn't then the matter be converted into pure energy, or is the quark simply made of energy not traveling at light speed? Perhaps one of the most crucial peices of evidence lies with anti-matter. A positron and an electon collide, then anhilate each other and produce pure energy. Can't we then come to a conclusion that the whole of their existance is pure energy in a state other then travelling at light speed? tl;dr - Is Energy and Matter synonymous through the medium of light speed?