Physicists still have no proof that dark matter exists at all, but the evidence for it is substantial. The movements of stars and galaxies can apparently be explained only if there is much more gravitating matter in the universe than the visible stuff of atoms and molecules. Attempts to correct the discrepancy by rewriting the rules of gravity in Einstein’s general theory of relativity have repeatedly failed.
WMIPs (weakly interacting massive particles) and Theoretical particles called axions are other oft-mentioned candidates. Dark Matter must be the hand that rocks the cradle of Cosmos, the verb in the sentence I AM THAT I AM.
This reminds me of the lines:
There are more things in heaven and earth, Horatio,
Than are dreamt of in your philosophy..’ (Hamlet Act I. Sc.v)
Shall we insert Science in place of the last word?