vacuum, n.Trivia

Space is silent, even with all the explosions, movement, and combustion because sound cannot travel in a vacuum

Light doesn’t actually move at the speed of light (unless in a vacuum).

If sound could travel through empty space, the sun would be louder than a train horn about one meter away (125 decibels)

the vaccum small these days, but the first vacuum was so large that it was brought to a house by horses.

a vacccum has an opposite --- the opposite of a 'vacuum' is a 'plenum'

Vacuums were originally so large that they were brought to a house by horses