America’s top college graduates increasingly reject careers in science and engineering, researchers have found, raising concerns about America’s technological future. Faced with the prospect of low-paid apprenticeships and training lasting a decade or more ? and constricted job opportunities even after that ? more of the brightest young Americans are instead pursuing the quicker and surer payoffs offered by business and certain professions, according to the Washington study. “With the notable exception of biological sciences, many of the top U.S. students with potential to become scientists are turning toward other career paths,” said one of the study’s co-authors.