Earth: Caves Saved from Above
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Karst ecologist Mike Slay goes to great depths to preserve cave habitats from pressures above and below. Watch as Jorge Ribas follows him deep underground in this clip from Discovery's "Earth"... (more info)

Karst ecologist Mike Slay goes to great depths to preserve cave habitats from pressures above and below. Watch as Jorge Ribas follows him deep underground in this clip from Discovery's "Earth" series.

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