Invention

The Pencil

It’s easy to take the pencil for granted, but that eraser-capped wooden cylinder with a core of graphite has a story and a history -- and Robert and Joe explore it in this episode of Invention. Learn more about your ad-choices at <a href="https://www.iheartpodcastnetwork.com">https://www.iheartpodcastnetwork.com</a>See <a href="https://omnystudio.com/listener">omnystudio.com/listener</a> for privacy information.

From agriculture to the X-ray machine, Stuff to Blow Your Mind hosts Robert Lamb and Joe McCormick explore the inventions we created, and how they created us.