Extreme Cave Diving | Preview

Preview: Season 37 Episode 5 | 1m 25s

A team of intrepid scientists journey into one of Earth's most dangerous and beautiful underwater frontiers.

Aired: 02/08/10

Rating: NR

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National corporate funding for NOVA is provided by <a href="" target=_blank">Draper</a>. Major funding for NOVA is provided by the David H. Koch Fund for Science, the <a href="" target="_blank">Corporation for ...