Chimeras, Hybrids, and Interspecies Research

In his 2006 State of the Union speech, President George W. Bush asked the U.S. Congress to prohibit the "most egregious abuses of medical research," such as the "creation of animal-human hybrids." The president's message echoed that of a 2004 report by the President's Council on Bioethics, which recommended that hybrid human-animal embryos be banned by Congress.