the.com/lifeforce
The invisible battery everyone claims is low at 4pm on a Tuesday.
means The vital energy or animating spirit believed to keep a living thing alive and going.
from A calque of the German Lebenskraft, the 18th-century vitalists' wager that biology runs on something more than mere chemistry.
Many namesChi, prana, qi, mana, elan vital.
Science verdictVitalism debunked; chemistry does the heavy lifting.
Sci-fi stapleAliens always want to drain yours.