[W] Worm Gates
Ages wraped in mystery traces of ancient cultures, that were flourishing in space. Great and small civilizations left in past the way to present, and silent artifacts are the last envoys to current space rangers.
The first explored unit was orbiting a planet of Barnard's Star. The "Worm Gates" title was given to this device by the first human researchers, who had activated them and revived the whole network, that pulled together distant and scattered worlds, revolutionary changing their political, economical, transportational models.
As it was discovered, these gates could instantly transfer huge entities over thousants light-years from one to another, maintaining global rapid transportational network.
They are made from specific photoactive crystals, that use photon energy for transfering and also controlled by photon signals. Unfortunataly it is impossible nowadays to reproduce such devices, but the researches are in progress.