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The deep-sea submersible Alvin has brought explorers to extraordinary places for more than 50 years. Now, as Alvin is poised to continue its revolutionary scientific work, a new set of upgrades will take it deeper than ever before.
- Released: Jan 01, 1970
- Runtime: 00:27:14 minutes
- Genre: Documentary
- Stars: Craig Sechler
- Network: PBS
