Well, they almost got it right.
Black Holes are not just Gates between Universes.
Black Holes create other Universes.
Our Universe was created by a Black Hole. Now it is creating others. Matter flows out of our Universe, through black holes, because there is an imbalance in energy. We have a lot, and it literally bursts out of it’s shell trying to get some breathing room. All that mass and energy has to go ‘somewhere’, and that ‘where’ is in building new Universes.
Besides, a black hole is like a Sunspot. Many think a sunspot is what shoots Solar Flares at the Earth. It doesn’t. It is merely a dark area, and cooler, and indicates a loss of energy (loss of connection of a magnetic/plasma field line). The field line when it snaps, acts like a whip and flings crap outward.
So, a Black Hole may actually indicate a loss of energy.
Because it is a loss of energy.
And it may appear cooler than surrounding matter.
Which it does.
A black hole may just be what is necessary at the center of a galaxy, to dissipate the intense heat, and keep it from setting up a chain reaction that would quickly destroy the galaxy.
Of course not. They're gates between universities. ;-)
Sorry, no. There is a whirling vortex of white-hot matter around black holes that have mass nearby. A black hole has a huge gravitational potential energy. Not like a sunspot. Analogy FAIL.
Or, rather than flushing logic and reason down the multiverse shyte hole... we can take the simpler hypothetical path - that all that mass/energy is eventually, simply, radiated out of the black hole as thermal Hawking Radiation.
There is only one Spock, and he doesn’t have an evile twin with a beard.