www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

Australian-born Elizabeth Blackburn smiles in her home in San Francisco, California, October 5, 2009. Blackburn along with two other Americans won the Nobel prize in medicine for discovering and identifying telomerase, the enzymen that renews the little caps on the end of chromosomes whose natural fraying underlies aging and cancer. [Agencies]