Brainstorming: Incorporate Dark Matter in a campaign

[dcarson]

Twistor by John G. Cramer uses multiple universes that only interact such that our gravity is the sum of all the universes mass. He is a university physics professor so the book is fairly hard SF.

[Flyndaran]

Originally Posted by Lord Azagthoth

Or dark energy (it repels galaxies from each other so why not use it as an TL^ fuel).

Energy is not fuel. Uniform heat is energy but by definition not usable to perform work. You must have a heat gradient to use.
Whatever dark energy is, it seems only to effect enormous structures like galaxies and galaxy clusters.
But as technobabble, it's as good as anything.

[Lord Azagthoth]

Just read the newspaper about Dragonfly 44 which consist 99.99% out of dark matter.

https://www.newscientist.com/article...most-no-stars/