Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human ... of the metal heart took ...

The first biohybrid model of human ventricles has been used to answer a centuries-old question. Unlike other organs, the heart cannot repair itself after injury, so being able to engineer an entire ...

This has been demonstrated in various animal models, but also in human heart muscle cells derived from stem cells and a computational model of the human heart. "These are great early steps but now we ...