Scientists successfully create human-monkey hybrid, raising ethical questions

Scientists have raised ethical questions after having successfully grown monkey embryos containing human cells for the first time.

“This paper is a dramatic demonstration of the ability of human pluripotent stem cells to be incorporated into the embryos of cynomolgus monkey when introduced into the monkey blastocysts,” said Magdalena Zernicka-Goetz, a developmental biologist at the California Institute of Technology.

Zernicka-Goetz and a team of other scientists performed an experiment that injected monkey embryos with human stem cells to watch them develop. The team observed the human and monkey cells divide and grow together in a dish, with three of the embryos surviving 19 days after the initial fertilization.

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