I has stumbled upon a whole new world. Or universe: ORION'S ARM WORLDBUILDING GROUP has more information than I could ever process.

To quote from their statement of purpose:

Our goal is to create a dramatic far-future universe that is internally consistent and abides as much as possible with the accepted facts and theories in the physical, biological, and social sciences.

Check out their Encyclopedia Galactica for overviews of speculative technologies.

Amazing!