Ever wonder what makes fish travel in schools? Mechanical engineer Maurizio Porfiri, of the Polytechnic Institute of New York University, wondered too. It turns out that fish follow other fish based more on behavior than looks. Check out this cool video from NPR’s Science Friday that shows how some fish react when placed with Porfiri’s robot fish: http://www.sciencefriday.com/program/archives/201204276

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