“We stood in the center of a football field-size dome that the Consu had constructed not an hour before. Of course, we humans could not be allowed to touch Consu ground, or be anywhere a Consu might tread; upon our arrival, automated machines created the dome in a region of Consu space long quarantined to serve as a receiving area for unwelcome visitors such as ourselves. After our negotiations were completed, the dome would be imploded and launched toward the nearest black hole, so that none ofits atoms would ever contaminate this particular universe again. I thought that last part was overkill.”

— Lieutenant John Perry,
Old Man’s War by John Scalzi, p. 270.