An anonymous reader writes "The legendary deep-sea manned submersible Alvin is retiring after 40 years of scientific work. Alvin has taken 12,000 people on over 4,000 dives, helping to confirm plate tectonics and continental drift. It discovered hydrothermal vents, salvaged a hydrogen bomb from the Mediterranean Sea and explored the Titanic. Alvin will be replaced by a larger vehicle that will come into service in 2008."
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