d20 Future: CODEX GALACTICA
The Ancients known as the Stoneburners are a mysterious cephalopod species that left strange, and often times sinister, ruins on dozens of worlds in the Northern Shadow Space. Due to the heavily chlorinated atmosphere metallurgy was impossible, so the Stoneburners studied more “esoteric” sciences that seem more like magic to contemporary scientists. They seemingly colonized other worlds by opening dimensional portals. They were also masters of genetic and matter manipulation. Stoneburner ruins have been deemed off-limits to Concord researchers as well as by many other stellar governments. This is due primarily to the strange fluted black spires that comprise the sites are guarded by stasis fields, automated defenses, surviving horrors of Stoneburner genetic experiments, and the danger of the creatures known as Dimensional Horrors. Still, scientists still get funding (and a healthy dose of military back-up) to set up orbital outposts to study these sites in hopes of unraveling some of the secrets of Stoneburner science.
(Taken from the Alternity Alien Compendium by TSR)