In the warp-drive literature, a shortage of imagination has never been the most recalcitrant hindrance. It has been one, savage demand: the demand of negative energy “exotic.” Recent theoretical ...

Casimir cavities are mysterious spaces between microscopic metal plates in a vacuum. Areas of diminished energy between the plates cause them to push toward each other, as if trying to fill the ...

If travel to distant stars within an individual’s lifetime is going to be possible, a means of faster-than-light propulsion will have to be found. To date, even recent research about superluminal ...