21 Chimeras 21 Chimeras 21.1. Jason Scott Robert & Françoise Baylis, Crossing Species Boundaries, Am. J. Bioethics, Summer 2003, at 1 Jason Scott Robert & Françoise Baylis, Crossing Species Boundaries, Am. J. Bioethics, Summer 2003, at 1 21.2. Comments: Julian Savalescu, Human-Animal Transgenesis and Chimeras Might Be an Expression of Our Humanity, and Hilary Bok, What's Wrong with Confusion? Am. J. Bioethics, Summer 2003, at 22-26. Comments: Julian Savalescu, Human-Animal Transgenesis and Chimeras Might Be an Expression of Our Humanity, and Hilary Bok, What's Wrong with Confusion? Am. J. Bioethics, Summer 2003, at 22-26.