Even before the Big Bang had occurred some 13.7 billion years ago, dark matter should have existed, for it has been accepted by the large scientific mainstream that more than 64% of the universe contained only dark matter, a concept still left to be discovered as to what it could be. actually Dark matter is estimated to constitute 84.5% of the total matter in the universe, while dark energy plus dark matter constitute 95.1% of the total mass–energy content of the universe [Ref.1-6]
Big Bang, Universe, Dark Energy, Dark Matter, Mass-Energy Content, Scientific Mainstream
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