Originele uitgave 26 mars 2006
Vorige aflevering S01E03 - Fresh Water
Aantal S01E04
Bestuurder Alastair Fothergill
Screenwriter David Attenborough
Land Verenigd Koninkrijk
Geslacht Documentaire
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Laatste update 9 septembre 2020 - 18:15
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Video : Caves

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The Cave of Swallows in Mexico is a 400m vertical shaft, deep enough to engulf the Empire State Building. The Lechuguilla cave system in the USA is 193km long and 500m deep with astonishing crystal formations hanging from its chambers. Although often overlooked, caves are remarkable habitats with equally bizarre wildlife. Cave angel fish cling to the walls behind cave waterfalls with microscopic hooks on their flattened fins. Cave swiftlets navigate by echo-location and build nests out of saliva. The Texas cave salamander has neither eyes nor pigment. Unique access to a hidden world of stalactites, stalagmites, snotites and troglodytes brings a wealth of surprises.

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