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Submarines, Secrets and Spies     Join celebrated oceanographer and explorer Robert Ballard, in search of clues to two tragedies of the Cold War, the wrecks of the nuclear submarines Thresher and Scorpion. See inside of a submarine, find out what does it feel like when a submarine launches a ballistic missile, and much more. From NOVA Online | Submarines, Secrets, and Spies http://www.pbs.org/wgbh/nova/subsecrets/

Innovative lives     Collection of biographies and major achievements of selected inventors, both from the near past and the present. From Innovative Lives http://www.si.edu/lemelson/centerpieces/ilives/index.html

Avalanche!     Go behind the scenes to see how natural disasters are captured on film. Learn how the movie Avalanche was shot and the elements of an avalanche. From NOVA Online | Avalanche! http://www.pbs.org/wgbh/nova/avalanche/