Human-like ears grown on the backs of mice by 3D printing under their skin show that it might one day be possible to replace body parts without the need for surgery
Source:
https://www.newscientist.com/article/2245295-human-like-ears-3d-printed-inside-mice-as-surgery-free-spare-parts/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home