It's more and more apparent that as we learn more about the universe and cosmology we really have no clue about what's gone on.

One of my favorites...

Maybe our universe isn't real. Yale Philosopher Nick Bostrum has claimed that we are probably living inside a computer simulation. Assuming it ever becomes possible to simulate consciousness, then presumably future civilisations would try it, probably many times over. Most perceived universes would be simulated ones - so chances are we are in one of them. In that case, perhaps all those cosmological oddities such as dark matter and dark energy are simply patches, stuck on to cover up early inconsistencies in our simulation.

This hypothethis is based on reality - consistent with how software is really developed.