One wild theory about Quantum Mechanics is :

An electron can exist in multiple states at the same time(Schrodingers cat) ,a photon takes every possible route between two points some less and some more probable(Double slit)…how is this happening?How can all states exist simultaneously?

This is also the key of quantum computing : Many processes can happen simultaneously

It could be a proof of Parallel universe, all these computations might be happening in parallel universes that quantum particles can traverse but we cannot