Did you know over 90% of US households own a vacuum cleaner? These handy-dandy descendents of the carpet sweeper revolutionized the cleaning game... but where did they come from? As Ben, Noel and Max discover in today's episode, your humble vacuum is the result of centuries' worth of wild ideas -- and more than a few crazily ambitious inventors, as well.

Knitting as Espionage, Part One: Secrets in the Stitch
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CLASSIC: Idiomatic for the People II, Part II
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Inventors Who Died Due To Their Own Inventions: The Irrational Death of Hippasus
34:48