Stuff To Blow Your Mind


Science & Medicine, Natural Sciences, Society & Culture

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Deep in the back of your mind, you’ve always had the feeling that there’s something strange about reality. There is. Join Robert, Joe and Christian as they examine neurological quandaries, cosmic mysteries, evolutionary marvels and our transhuman future on Stuff To Blow Your Mind, a podcast from HowStuffWorks.com.


May 8th, 2012

Episode 251 of 846 episodes

Civilizations surround themselves in walls. They raise walls against enemies, against the environment and against the spirit world. In this episode, Robert and Julie examine walls, from Ming Dynasty battlements to the galactic borders of our universe.

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