2017-01-12 from Nature News: Oliver Smithies, a pioneer in the field of gene targeting, has died aged 91. Smithies shared the 2007 Nobel prize for medicine for a technique that allowed biologists to easily identify the function of genes, by generating ‘knockout’ mice — mutants in which specific genes are disabled. Smithies was a professor at the University of North Carolina at Chapel Hill. https://www.nytimes.com/2017/01/11/science/oliver-smithies-genetics-nobel-winner-dies-at-91.html?_r=0