Their immense size needs an equally immense source to get them to move. Another blackhole for example, or another galaxy. Gravity tugging on gravity.

It was a poor choice of words. Of course they "know how to move" as much as an asteroid knows how to move. Motion is all about force and gravity

Black holes are the only things that generates enough of gravity to hold a galaxy together, naturally that is

General Relativity predicts dilation not singularities. Dilation explains dark matter. In the 1939 journal "Annals of Mathematics" Einstein wrote - "The essential result of this investigation is a clear understanding as to why the Schwarzchild singularities (Schwarzchild was the first to raise the issue of G.R. predicting singularities) do not exist in physical reality. Although the theory given here treats only clusters (star clusters) whose particles move along circular paths it does seem to be subject to reasonable doubt that more general cases will have analogous results. The Schwarzchild singularities do not appear for the reason that matter cannot be concentrated arbitrarily. And this is due to the fact that otherwise the constituting particles would reach the velocity of light." He was referring to the phenomenon of dilation (sometimes called gamma or y) mass that is dilated is smeared through spacetime relative to an outside observer. It's the phenomenon behind the phrase "mass becomes infinite at the speed of light". Time dilation is just one aspect of dilation, it's not just time that gets dilated. There is no singularity at the center of our galaxy. It can be inferred mathematically that dilation is occurring there. In other words that mass is all around us. This is the explanation for galaxy rotation curves, the "missing mass" is dilated mass. Dilation does not occur in galaxies with low mass centers because they do not have enough mass to achieve relativistic velocities. To date, 6 very low mass galaxies including NGC 1052-DF2 and DF4 have been confirmed to show no signs of dark matter. There was clarity in astronomy before television and movies popularized singularities beginning in the 1960's. Einstein is known to have repeatedly said that they cannot exist. Nobody believed in them when he was alive including Plank, Bohr, Schrodinger, Dirac, Heisenberg, Feynman etc

@@shangrilaladeda Dark matter.

Watch "youtube science scam crisis" Be aware, spread the word. Be very weary on where you get your information from now a days this "headline generation" time has been getting weird

indeed, it's well known that the distances needed to travel to other places are just too far - even at the speed of light

I like this thought, it merges the thought of everything being information. Information is a form of energy and if we can agree that all matter is based on energy and that energy cannot be destroyed but that it can be created and recycled, then this seems plausible.

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Who asked?

When

Because large stars in the black while collapse and form another black hole, thus creating more universes within universes