“Dark Matter” is invisible matter that tries to hold the universe together with gravity. “Dark Energy” is invisible energy that accelerates the dispersion of the universe.

Rockets and Mayhem is a set of stories set in a dwarf galaxy where dark matter and dark energy are as thick as molasses, yet as invisible as you would expect, until the enlightened souls of the residents sing in the correct key. My friends help me tell the stories. Mostly, to the extent that genre applies, they are retro-futuristic space-fantasy of a broadly utopian vision. Think “Star Wars”, but with better representation (and hopefully, characterization) of diverse humanity.

Not that we have any humans, per se.