In this photo released from the University of Florida’s Institute of Food and Agricultural Sciences, environmental horticulture professor David Clark discusses chemicals that contribute to the fragrances of flowers and tastes of fruits and vegetables as a cameraman prepares to shoot video footage, in Clark’s laboratory on the main UF campus in Gainesville – Tuesday, April 7, 2009. Clark was one of several researchers interviewed for an upcoming television program on Discovery’s Science Channel. (AP photo/University of Florida/IFAS/Tyler Jones)

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