Deep Part 1 - Into the Deep
For decades, explorers have been perfecting the crafts
that can brave crushing pressure on deep sea dives. Alvin
is one successful submersible -- used first by the Navy,
then by scientific expeditions.
Deep Part 2 - Deep Science
In 1977, Alvin scientists discovered a whole new world
-- an underwater ecosystem reliant not on the sun, but
on volcanic vents on the ocean floor.
Deep Part 3 - Greater Depths
When Alvin retires in a few years, what will its successor
be like? Scientists are designing the next generation
of manned submersible.