The Earth's large, deep calcareous caves are virtually inaccessible and therefore barely explored - requiring expert diving where flooded. Some of its wildlife is as strange and specific as in the deep, darkest part of the ocean, whether physically adapted -notably to the dark. Nevertheless, some caves(did) play an important part in native cultures, even as sources of fresh water for some Mayan cities.
Calificación de episodios
Reparto del episodio
99
1
- Self - Narrator
- Narrator - US Version
- Self - Producer
- Narrator
- Self - Field Assistant
- Inuktitut Narrator
- Self - Narrator Japan