Witness History cover image

The man who invented the scratch card

Witness History

00:00

Intro

Opening ads and the host introduce the episode and its topic: the invention of the scratch card and John Koza's role.

Transcript
Play full episode

The AI-powered Podcast Player

Save insights by tapping your headphones, chat with episodes, discover the best highlights - and more!
App store bannerPlay store banner
Get the app