Elizabeth Blackburn of the University of California at San Francisco, who shared the 2009 Nobel Prize in Physiology or Medicine with Carol Greider of Johns Hopkins University and Jack Szostak of Harvard University, was fascinated about animals and life while growing up in Tasmania. As a researcher, she started studying Tetrahymena, which lives in pond scum. How did those studies lead to her prizewinning research in telomeres (the ends of chromosomes)–and eventually to what they tell us about healthful habits like exercise, the debilitating effects of stress and depression, and diseases such as cancer? Watch this insightful Google Science Fair Hangout On Air for all of that and more.

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