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  1. Deep Secrets (1986 Video)

    Producer
    Andrew Crilly
    Subject
    Biology
    Distribution
    OUT OF DISTRIBUTION, Videocassette. Standard formats. col. 24 min.

    Whales can dive to a depth of up to 2000 metres, and they can stay down on a single breath for over an hour. Looks at reseach into how whales solve the problem of diving so deeply. Most of the programme was...

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