![Scientists have made a mouse embryo that's 4% human -- the highest level of human cells in an animal yet | CNN Scientists have made a mouse embryo that's 4% human -- the highest level of human cells in an animal yet | CNN](https://media.cnn.com/api/v1/images/stellar/prod/200521133502-01-human-mouse-chimera.jpg?q=x_4,y_0,h_2473,w_4395,c_crop/h_720,w_1280)
Scientists have made a mouse embryo that's 4% human -- the highest level of human cells in an animal yet | CNN
![Human-animal hybrids are coming and could be used to grow organs for transplant – a philosopher weighs in Human-animal hybrids are coming and could be used to grow organs for transplant – a philosopher weighs in](https://images.theconversation.com/files/286644/original/file-20190801-169692-1er7dbo.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=754&fit=clip)
Human-animal hybrids are coming and could be used to grow organs for transplant – a philosopher weighs in
![Human-mouse HYBRID: Scientists grow human brain in tiny rodent | Animals, Animal photo, Mouse photos Human-mouse HYBRID: Scientists grow human brain in tiny rodent | Animals, Animal photo, Mouse photos](https://i.pinimg.com/736x/90/80/dc/9080dca9e0b7f13e9477f161035bfe35.jpg)
Human-mouse HYBRID: Scientists grow human brain in tiny rodent | Animals, Animal photo, Mouse photos
![Scientists create the most advanced human-mouse 'hybrid' embryo, with 4% of human cells | Daily Mail Online Scientists create the most advanced human-mouse 'hybrid' embryo, with 4% of human cells | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2016/01/11/10/300731C500000578-0-image-a-2_1452507336644.jpg)
Scientists create the most advanced human-mouse 'hybrid' embryo, with 4% of human cells | Daily Mail Online
![Scientists have made a mouse embryo that's 4% human -- the highest level of human cells in an animal yet | CNN Scientists have made a mouse embryo that's 4% human -- the highest level of human cells in an animal yet | CNN](https://media.cnn.com/api/v1/images/stellar/prod/200521133657-02-human-mouse-chimera.jpg?q=w_1992,h_1121,x_0,y_0,c_fill)
Scientists have made a mouse embryo that's 4% human -- the highest level of human cells in an animal yet | CNN
![Animal-Human Hybrids Spotted on New York Subway in Surreal Paintings by Matthew Grabelsky — Colossal Animal-Human Hybrids Spotted on New York Subway in Surreal Paintings by Matthew Grabelsky — Colossal](https://www.thisiscolossal.com/wp-content/uploads/2020/01/82150240_10221720059767794_7475322189923745792_o.jpg)