Entrances to the underworld have been places of wonder for eons, and humans have ventured into caves to sleep, hunt, create art and explore. Thanks to the hobby of caving, that tradition continues today. Get all this plus Chuck discussing his caving experience, in this classic episode.
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Selects: How Narcolepsy Works
52:41

Rope, yeah ROPE!
43:31

Short Stuff: Did a shipwreck double the size of the United States?
11:46