we all kow dark matter but do we know how it came into existence?one possible answer is from einsteins mass energy equivalence.if we assume matter is energy as both are interconvertible then we reach a conclusion that during big bang there was release of energy which eventually got converted into mass ie -the visible universe but what is beyond that is that during big bang perhaps some mass was left behind in intermediate energy form both as matter and energy which is what we call dark matter and dark energy i mean to say that dark matter so called could be such a form of matter that is neither true matter nor true energy it is pseudo mass energy form of matter Now am i right?