Walls
- Author
- iHeartPodcasts
- Published
- Tue 20 Aug 2013
- Episode Link
- https://omny.fm/shows/stuff-to-blow-your-mind/walls
Walls:Civilizations surround themselves in walls. They raise walls against enemies, against the environment and against the spirit world. In this classic episode, Robert and Julie examine walls, from Ming Dynasty battlements to the galactic borders of our universe.
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