CNN announced the winners of its seventh between 13 and 18 science fair annual . The contest was free to enter and open to all students around the world between 13 and 18 years of age . Grand prize winner is teen whose project improves accuracy of breast-cancer diagnoses . The contest was free and open to all students around the world annual .
CNN announced the winners of its seventh between 13 and 18 science fair annual . Grand prize winner is teen whose project improves accuracy of breast-cancer diagnoses . The contest was free and open to all students around the world annual .