[Verginius Rufus]

Dormant black holes? They are just out there sleeping?

Makes me think of the French song, "SMBH, dormez-vous?"

Or is it "Frere Jacques, dormez-vous?"

[alancarp]

I’d just figured that a dormant black hole might be so simply because it has already eaten everything within its gravitational reach. (Which is kinda creepy/scary to think of now that I said that out loud).

[Red Badger]

Dormant because they have consumed everything in their gravity well, nothing left to make any sign of their presence.

Kind of like an Antlion trap, but more massive..................