Here’s another case of science fiction making cool predictions and being right.
This time, Doctor Who gets credit for suggesting black holes as power sources.

Black
Hole Dynamos Spawn Monster Energy Fields

Cosmic dynamos in black holes could be the most efficient power plants in the universe, spawning magnetic energy fields so big they push past galaxy borders and into intergalactic space, scientists said Monday.

These monster magnetic fields have been known to astronomers for decades, and the link between them and black holes has also been theorized, but now researchers have created a picture of the energy fields and measured just how huge they are.