Warp core engine
From Tardis Wiki, the free Doctor Who reference
Warp core engines were the propulsion systems of Rutan Motherships, and were apparently grown rather than built, as the Doctor described the engines of a ship that had been buried under the town of Stockbridge for several centuries as suffering a heart attack when they started malfunctioning. This would suggest that the engines were organic, or at least semi-organic, structures. They contained a cardio-electric capacitor and a metabolic failsafe. If damaged, an engine could cause a hyperspatial warp that would result in a time bubble. (AUDIO: The Eternal Summer)
