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Episode Information

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Episode description: Marine biologist Greg Marshall and squid expert Dr. Clyde Roper attach a research instrument to a sperm whale, then watch as it dives thousands of feet to its squid-hunting grounds. [cc]

Rating: [TV-PG] (Parental Guidance Suggested)

Series Information: The World of National Geographic

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First aired: Wednesday, February 7, 2001 (excluding any air dates prior to June 1999)

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