Where the Men Are Men and the Sheep Are, Too

Here’s a story I missed last week while I obsessed on the Angolan Marburg outbreak, via the California Stem Cell Report:

Author Jamie Shreeve wrote about the 2005 versions of chimeras in the New York Sunday Times Magazine. Some of his examples are located here in the west, such as experiments involving implantation of human stem cells in sheep.

Esmail Zanjani, a hematologist in the College of Agriculture, Biotechnology and Natural Resources at the University of Nevada at Reno, says he has sheep with livers that are 40 percent humanized. Shreeve, in discussing the ethics of such situations, asks the rhetorical question, ?

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