Some scientists believe in parallel universes and are unsure how they may or may not interact. Some scientists also believe in the so called "Big Bang' that began the expansion of our universe.
Since everything is made up of molecules/atoms (or matter in general) etc and all those things have a resonant frequency, what if each parallel universe operates at a different resonant frequency and our brain is only tuned to receive/understand the frequencies of our own universe? This would somewhat explain why we cannot perceive the other universes. Keep that in-mind for the below.
My theory is what if black holes are just vacuums sucking all the energy from one parallel universe into itself only to be blasted out the other side (that we cannot see) creating the "Big Bang" event to create the beginning of the next universe?
Makes you think, even if it sounds crazy.