Scientists managed to print a piece of a real heart on a 3D printer.

A team at Harvard's Wyss Institute has developed a method to 3D print cardiac macrofilaments, muscle filaments that can, in perspective, mimic the complex alignment of the contracting elements of the human heart. According to scientists, the technology has every chance to gain a foothold in regenerative cardiology. So far, only a small piece of heart tissue has turned out, but the technology has proven its promise. And while it's still too early to talk about creating a full-fledged organic heart, the development can already be used to replace scars after heart attacks or even to correct the hearts of newborns affected by congenital malformation.