Series of proposals....

1. If the universe is expanding, then it was once very compact, so compact that it might have been a black hole. Is it reasonable to propose that the universe started out as the core of a black hole?

2. Black holes begin when a lump of matter collapses under its own gravity. The lump of matter does not contain any antimatter. Is it reasonable to propose that our universe contains mostly matter, without equal amounts of antimatter, because of the matter that constituted the original collapsed mass?

3. Black holes continue to suck in matter after collapsing, typically from an accretion disk. This accretion disk is often reduced to plasma of subatomic particles before being captured by the event horizon. Is matter converted purely to energy upon capture? After collapse, does a black hole only allow pure energy inside?

4. If we live inside a black hole, and it is still growing, is it only increasing its total energy? If energy and spacetime are equivalent, via Planke's Constant, then could this Dark Energy be manifested as growing voids between galaxies, and an expanding universe?

5. How big would our black hole be? How much matter has it absorbed? Is there a pattern of growth that suggests an accretion disk is the main feedstock of energy?

6. Is there anything that could be inferred about the universe outside our own? Or about universes within our own?