Starships begin to enter the wormhole to explore, colonize and trade. Now in orbit around Earth, Prophet sees a massive Ceph warship coming through the wormhole. What is left is the Ellis wormhole, a nongravitating, purely geometric, traversable wormhole. Twelve volunteers traveled through the wormhole to individually survey the planets. Examples of apparent FTL proposals are the Alcubierre drive and the traversable wormhole. The inclusion of these wormhole geometries prevents the entropy from increasing indefinitely. Sagan incorporated Kip Thorne's study of wormhole space travel into the screenplay. Arroway falls unconscious as she begins traveling back through a wormhole. Closed-curve space is generally known as a wormhole or black hole. For a simplified notion of a wormhole, space can be visualized as a two-dimensional surface. It routes the packets using wormhole routing. His body is sucked into a wormhole caused by Eobard's manipulations. However, a light beam traveling through the same wormhole would beat the traveler. Stark intercepts the missile and takes it through the wormhole toward the Chitauri fleet. They are shown disappearing into a self-made wormhole together.