William Saletan opines in Slate on the feasibility — and the growing acceptance — of humanizing animals for the purposes of scientific and medical studies. Included in the many examples: using animals to create humanized antibodies and making humanized mice with symptoms of Alzheimer's disease. Though he's definitely in favor of humanizing mice brains for disease research, he does mention that at first ethicists from Stanford University were not. Do the mice get to chime in what they think?