World Model · podcast knowledge graph

100 Objects #2: 60-Degree Screw

2026-05-29 · 36 min · 9 entities

episode page audio

Asserted relationships

  • → hosted by Roman Mars person
    0.55
    evidence rules-v4
    Feed author/publisher: Roman Mars
  • → discusses Arts concept
    0.40
    evidence rules-v4
    Feed category: Arts
  • → discusses Design website
    0.40
    evidence rules-v4
    Feed category: Design
  • → hosted by SiriusXM Podcasts and Roman Mars company
    0.40
    evidence rules-v4
    Feed author/publisher: SiriusXM Podcasts and Roman Mars

Entities found in this episode

concepts 3

  • mentioned Arts concept
    0.50
    evidence rules-v4
    Feed category: Arts
  • mentioned 60-Degree Screw concept
    0.42
    evidence rules-v4
    100 Objects #2: 60-Degree Screw
  • discusses Arts concept
    0.40
    evidence rules-v4
    Feed category: Arts

persons 2

  • mentioned Roman Mars person
    0.70
    evidence rules-v4
    Feed author/publisher: Roman Mars
  • hosted by Roman Mars person
    0.55
    evidence rules-v4
    Feed author/publisher: Roman Mars

companys 2

websites 2

  • mentioned Design website
    0.50
    evidence rules-v4
    Feed category: Design
  • discusses Design website
    0.40
    evidence rules-v4
    Feed category: Design
Episode description as stored
In the early 20th century, nothing quite fit — fire hoses couldn't connect to one another, football teams played with different balls, traffic lights meant different things in different states. Then World War II exposed the deadly cost of incompatibility, and the US quietly imposed a single solution on production lines across the world: the 60-degree screw. Roman Mars and historian Daniel Immerwahr tell the story of a hidden industrial empire, built one standard at a time. A History of the United States in 100 Objects is a production of 99% Invisible and BBC Studios . Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus . Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.