novoselov is younger and served under geim. he is the youngest laureate in nobel physics history since 1973. you know, it's nice to have guys who are having fun, letting the hamster co-author and levitating frogs on the side. it's nice to have guys who are willing to take it with a sense of humor. >> lehrer: it's nice to have miles o'brien as our new science editor. thank you very much, miles. again, welcome. >> you're welcome. thank you. >> woodruff: finally tonight, president obama shined a spotlight on community colleges today as he drew a direct line from the education these schools provide to the country's economic rehabilitation. at a white house summit today, president obama urged a much greater role for community colleges. he said two-year schools can help raise the percentage of young people earning college degrees. the u.s. currently ranks ninth among all nations. >> by 2020 america will once again lead the world in producing college graduates. and i believe community colleges will play a huge part in meeting this goa