In this episode: learn about the Challenger mission, an effort from the U.S. Integrated Ocean Observing System and Rutgers to send ocean gliders around the world. We then look back to the 2009 Scarlet Knight mission, the first successful ocean glider crossing of the Atlantic. We end with a screening of a teaser from the 2010 documentary 'Atlantic Crossing: a robot's daring mission.' (5:41 minutes)

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