DNA technology has advanced to the point where researchers can now check restaurant dishes and determine whether what is on the menu is what is on the plate…or, what is on the invoice is what is in the box. For example, a team from the American Museum of Natural History recently sampled 68 servings of tuna sushi at 31 sushi bars in New York and Denver, reports the Wall Street Journal. Half the eateries had incorrectly labeled dishes, often using a species called escolar rather than the ...

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