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Last fall, EARTH caught up with geochemistry grad student Jeremy Jacquot as he was about to embark on the first U.S.-led GEOTRACES cruise across the Atlantic, where he and 32 researchers were hoping to measure and track concentrations of various trace elements and isotopes. This month, in "Tracking Trace Elements and Isotopes in the Oceans," we follow up with Jacquot as he details the highs, lows and initial findings from the cruise, which was unfortunately cut short due to a ship malfunction.