Scientists Create Early Embryos That Are Part Human, Part Monkey

Using fluorescent antibody-based stains and advanced microscopy, researchers are able to visualize cells of different species origins in an early stage chimeric embryo. The red color indicates the cells of human origin.

An international team has put human cells into monkey embryos in hopes of finding new ways to produce organs for transplantation. But some ethicists still worry about how such research could go wrong.

(Image credit: Weizhi Ji/Kunming University of Science and Technology)

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