A team of researchers led by the Spanish scientist Juan Carlos Izpisúa has created 132 human-monkey embryos in a laboratory in China, in a controversial experiment first revealed by EL PAÃS in the summer of 2019 and now officially published in detail.
Three of the embryos, which grew to contain up to 10,000 cells, developed for 19 days outside the uterus, at which point the researchers interrupted the study, they said in an article published by the scientific journal
Cell on April 15. Scientists use the term âchimeraâ from Greek mythology to refer to these hybrids, in reference to a creature with the head of a lion, a goatâs head on its back and a snakeâs head for a tail.