Though there is a lot of brain mass which we don't actually use, our brain isn't equiped to even imagine an answer to the question you are asking, that's not to say that it wouldn't be able to contain the knowledge if we were enabled to understand it, maybe it is a facility that has been purposfully removed from us for fear of what we would do with it, maybe our existence on the planet is to prove to us what will happen if we are left to our own devices, much the same as a farther would say to his offspring who wouldn't do as he advised..... In All, a very good question....
Thanks
Pete