45 min
The Pencil Invention
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- History
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.
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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 https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.
45 min