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. Credit: Weizhi Ji/Kunming University of Science and Technology Scientists Create Early Embryos That Are Part Human, Part Monkey By at 8:01 am NPR For the first time, scientists have created embryos that are a mix of human and monkey cells. The embryos, described Thursday in the journal Cell, were created in part to try to find new ways to produce organs for people who need transplants, says the international team of scientists who collaborated in the work. But the research raises a variety of concerns.