Why Itches Spread, Ancient Vending Machine, and Not Realizing When Your Beliefs Change

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By Discovered by Player FM and our community — copyright is owned by the publisher, not Player FM, and audio streamed directly from their servers.

Learn about the world’s first vending machine that was invented nearly 2,000 years ago; why scratching an itch can make it spread; and, why you probably don’t realize it when your beliefs change.

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461 episodes available. A new episode about every day averaging 9 mins duration .