S14 · E17
Volcano!
Millions live in the shadows of nature's ticking time-bombs—volcanos. NOVA accompanies scientists who are developing new techniques to predict when volcanos will erupt and how violently.

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S14 · E17
Millions live in the shadows of nature's ticking time-bombs—volcanos. NOVA accompanies scientists who are developing new techniques to predict when volcanos will erupt and how violently.
Feb 17, 1987 · 55m