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(Denver, Colo., September 13 2004) Kara Berg, an eighth-grader at Most Precious Blood Parish school, is a semifinalist for the discovery channel national science competition ... she swabbed bathroom door handles in her home, school and a local grocery store to find out which is cleanest and it wasn't her home. She's in her science class, looking for stomata in spinach leaves under the microscope. (photo by ELLEN JASKOL/ROCKY MOUNTAIN NEWS)

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