News Genetics New hybrid embryos are the most thorough mixing of humans and mice yet Chimeras could usher in a deeper understanding of how cells build bodies Human cells (green) pack into a developing mouse’s eye (blue) in this hybrid embryo. J. Feng By Laura Sanders May 13, 2020 at 2:00 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print Scientists have made embryos that are a lot mouse and a little bit human. With a little help, human stem cells can knit themselves into growing mouse embryos, populating the developing liver, heart, retina and blood, researchers report May 13 in Science Advances.