Nightly News

Nightly News   |  September 22, 2006

Making a Difference: Nobel Prize winner Elizabeth Blackburn

Sept. 29, 2006: Elizabeth Blackburn, a scientist from Tasmania, Australia, found a protein that determines the life span of cells, so crucial to the study of aging, stress, cancer and many other diseases. Her discovery led to her winning the 2009 Nobel Prize in medicine. NBC's Robert Bazell reports.

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