We put man on the moon before we invented the wheeled suitcase. Why did it take so long? Find out in this episode of Patented: History of Inventions, where host Dallas Campbell is joined by expert Katrine Marçal, whose research has revealed an intriguing hidden chapter in the invention story of rolling luggage.

If you're interested in the stories behind the world's greatest inventions — from the mighty steam train to the humble condom - subscribe to Patented: History of Inventions, created by our friends over at History Hit.

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