In one form or another, pens have been around for centuries. Unfortunately, they've also been messy, inconvenient and unreliable. Learn how Laszlo Biro's Stuff of Genius brought pens into the modern age in this episode.

Stuff of Genius tells the story behind everyday inventions. From the bikini to super wheat and everything in between. Viewers will learn the stories of unsung inventor heroes and their trials, tribulations and successes.

Check out new episodes every Monday, Tuesday and Thursday.

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