Two New York City high school students exploring their homes using the latest high-tech DNA analysis techniques were astonished to discover a veritable zoo of 95 animal species surrounding them, in everything from fridges to furniture, from sidewalks to shipping boxes, and from feather dusters to floor corners.

By John Schwartz Many sushi restaurants and seafood markets are playing a game of bait and switch, say two high school students turned high-tech sleuths.