Hello everybody! I've just joined this forum looking for answers to my possibly newby questions. I read somewhere (don't recall the source) that the universe is expanding at a rate that is faster than the speed of light, and is slowing down. Is there any kind of relation of this expansion and the mass–energy equivalence? For instance: - Before the big bang, space was non-existant: could it be that there was only energy, and no mass? - While expanding: Is there a general increase in mass and thus loss in energy? Could be the lack of sleep and overuse of coffee talking, but stil... Pardon my English and terminology and lack of knowledge in this field: I'm a mere (interested) Belgian electrical engineer.