Human-Animal Chimeras Are Gestating on U.S. Research Farms

The worry is that the animals might turn out to be a little too human for comfort, say ending up with human reproductive cells, patches of people hair, or just higher intelligence. “We are not near the island of Dr. Moreau, but science moves fast,” NIH ethicist David Resnik said during the agency’s November meeting. “The specter of an intelligent mouse stuck in a laboratory somewhere screaming ‘I want to get out’ would be very troubling to people.”
https://www.technologyreview.com/s/545106/human-animal-chimeras-are-gestating-on-us-research-farms/