It's been long thought that space must contain some hidden substance in order to allow energy to transmit over it, they use to call it the "ether". Now one has to ask, is there in fact something in space that we just can't see, is the universe based on some building block that we have no way of detecting?
I would love to hear some theories on what people think this might be, or if you believe there is nothing at all, in which case I would love to understand how energy travels on nothingness.
I just started thinking about this, and will come up with some ideas.