Creation of First Human-Monkey Embryos Sparks Concern

April 26, 2021

(Wall Street Journal) – Imagine pigs with human hearts or mice whose brains have a spark of human intelligence. Scientists are cultivating a flock of such experimental creations, called chimeras, by injecting potent human cells into mice, rats, pigs and cows. They hope the new combinations might one day be used to grow human organs for transplants, study human illnesses or to test new drugs. In the latest advance, researchers in the U.S. and China announced earlier this month that they made embryos that combined human and monkey cells for the first time.