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(From Wikipedia) A domed city is a kind of fictional structure that encloses a large urban area under a single roof. In most descriptions, the dome is airtight and pressurized, creating a habitat that can be controlled for air temperature and…

(From Wikipedia) In science fiction, floating cities are settlements that strictly use buoyancy to remain in the atmosphere of a planet. However the term generally refers to any city that is flying, hovering, or otherwise suspended in the air via any…

(From Wikipedia) In physical cosmology, astronomy and celestial mechanics, anti-gravity is the idea of creating a place or object that is free from the force of gravity. It does not refer to the lack of weight (but not the lack of gravity)…

(From Wikipedia) The orgasmatron is a fictional electromechanical device that appears in the 1973 movie Sleeper, which also shows the effects of a related device, an orgasmic orb. Similar devices have appeared in other fictional works. The term has…

A transporter is a fictional teleportation machine used in the Star Trek universe. Transporters convert a person or object into an energy pattern (a process called dematerialization), then "beam" it to a target, where it is reconverted into matter…

(From Wikipedia) A Hoverboard (or hover board) is a fictional hovering board used for personal transportation in the films Back to the Future Part II and Back to the Future Part III. Hoverboards resemble a skateboard without wheels or trucks. Through…

Rayguns are a type of directed-energy weapon. They are a classic and widespread feature of science fiction. Types of raygun have various names: ray gun, death ray, beam gun, blaster, laser gun, phaser, etc. They supply the general role of guns in the…