During the two World Wars, knitting became an important way to encode and send messages in secret. Learn about the history of wartime knitting in this episode of BrainStuff.
Learn more about your ad-choices at https://www.iheartpodcastnetwork.com

How Do Fainting Goats Work?
09:04

Does Smog Make Sunsets More Beautiful?
08:23

Why Does Albania Have Hundreds of Thousands of Bunkers?
08:00