This is a short promotional video that was released in 2015 with the publication of Neal Stephenson's "hard" science-fiction novel, SEVENEVES. It features a brief look at the development of designs for some of the speculative near-Earth-orbit structures that were featured in the novel. Stephenson's technical advisors for designing these structures were engineers from the companies Planetary Resources, Inc. (development of technologies for asteroid mining) and Tethers Unlimited, Inc. (aerospace r