3 Americans share 2009 Nobel medicine prize

 FILE - In this file photo of Saturday, March 14, 2009 U.S. biologists Elizabeth H. Blackburn from San Francisco, left, and Carol Greider from Baltimore pose next to a bust of Paul Ehrlich before they were awarded the Paul Ehrlich and Ludwig Darmstaedter science prize in Frankfurt, Germany. On Monday Oct. 5, 2009 Sweden's Karolinska institute gave the 2009 Nobel Prize in medicine to Americans Elizabeth Blackburn, Carol Greider and Jack Szostak. The institute says the trio was awarded 'for the discovery of how chromosomes are protected by telomeres and the enzyme telomerase.'

The Origins of Cellular Life

Dr Jack Szostak studies the orgin and early evolution of life through efforts to design and synthesize a self-replacing protocell capable of Darwinian evolution.

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