I was pondering to myself today while reading Einstein's Evolution of Physics, so I was looking at E=mc^2 and it got me wondering. If mass and energy are the same, but mas cannot be created or destroyed through the law of mass conservation does the same hold for energy? Is energy created or has it always existed, has it existed around the time of mass or perhaps even before it? Think of this perhaps the beginning of the universe it was nothing more than freebound energy, and the energy finally collided, and solidified into a mass, this mass then broke apart in the big bang which formed the planets, stars and systems and so forth. Now this energy is still present coming form this mass continuing to seperate it and combine it with other masses. This energy came to form gravity, light, sound and the other forces which are contained within in the universe. So, I got to thinking maybe mass did not always exist as mass what if it was energy but where did the enrgy come from some sort of rift? Maybe the energy was always there as it seems more sensible that energy would have existed before the mass as the mass is what created the universe and that mass and energy are equal. So in my theory I am stating that this energy is the beginning of everything we know, the forces, the matter and time and space itself. Let me know what you think?