- Physical Description: 1 online resource (1 video file (approximately 55 min.)) : sd., col.
- Publisher: [United States]: PBS , 2008.
- Distributor: Made available through hoopla
|Restrictions on Access Note:|| Digital content provided by hoopla.
|Participant or Performer Note:|| Narrator, Edd Gasper.
|Summary, etc.:|| It's pitch black, toxic gases bubble up from deep below, sulfuric acid drips from above, and carbon monoxide fills the air. It's not a scene from a horror movie, but the interior of a beautiful, but treacherous, cave. Explore the beauty and danger found in some of the world's most exotic caves as NOVA explores dark recesses, off limits to all except researchers. Gather your courage and discover an astonishing universe few will ever experience.
|Target Audience Note:|| Rated PG.
|System Details Note:|| Mode of access: World Wide Web.
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