Scientists made a six-legged mouse embryo — here’s why

This six-legged animal isn’t an insect: it’s a mouse with two extra limbs where its genitals should be. Research on this genetically engineered rodent, which was published on 20 March in Nature Communications1, has revealed a way in which changes in DNA’s 3D structure can affect how embryos develop. Developmental biologist Moisés Mallo, at the … Read more