I've always been interested in the big picture of things in the universe but I've never had the opportunity to pursue science any farther than TV series such as The Cosmos, The Universe, etc. but either way I've been thinking a lot on the various things that I've seen and heard from these series. For instance from my understanding light is the absolute speed limit in the universe and cannot be exceeded. However black holes are so powerful via gravity that light cannot leave them. How is this possible given light is the max speed in existence unless the medium it self is folded into itself or as we perceive it dark matter to matter. Also Is it possible that dark matter/energy is the medium in which the universe we can see exists? For example with regards to the model I have in my head : [EDIT: moderator has deleted personal speculation] I'm 99.9% sure my imagination has run off somewhere early on there but either way its good to be thinking about these kinds of things. To that end are there any books or other sources of information people could suggest I read to better understand everything better. To be honest I've have no idea where to start with regards to what fundamental principles should I learn etc.