The spines of sea urchins can generate a voltage when water moves around them — a phenomenon that could be used to design underwater flow sensors.
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This Side Hustle Spotlight Q&A features Federica Mercuriello, 42, founder of Sausly, a business selling pasta and sauce kits made in Italy. Originally from Italy and now based in Miami, Florida, Mercuriello moved to the U.S. in 2009 on a scholarship to study civil engineering at Columbia University. Responses have been edited for length and clarity.