Szostak, recipient of the 2009 Nobel prize in Medicine, pauses before speaking to reporters during a news conference at Massachusetts General Hospital in Boston
Jack Szostak, recipient of the 2009 Nobel prize in Medicine, pauses before speaking to reporters during a news conference at Massachusetts General Hospital in Boston, Massachusetts October 5, 2009. Three Americans won the Nobel prize for medicine on Monday for discovering and identifying telomerase, the enzyme that renews the little caps on the end of chromosomes whose natural fraying underlies aging and cancer. REUTERS/Jessica Rinaldi (UNITED STATES SCI TECH)
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