This is an impressive achievement, but the headline is way off. The leaf was not transformed into 'heart tissue' and was not 'beating.'
Instead, the researchers appear to have stripped a leaf down to its cellulose structure and grown human cells on top of it to demonstrate a way of using a plant's vascular system to replace the vascular system in human tissue.
Instead, the researchers appear to have stripped a leaf down to its cellulose structure and grown human cells on top of it to demonstrate a way of using a plant's vascular system to replace the vascular system in human tissue.