Heart Attack

For all they do for us, our hearts aren't very good at repairing themselves. So when a person suffers a heart attack, their blood pump is left with a large amount of scar tissue, which can impede the organ's flexibility and thereby its function. Inspired by the way young hearts heal themselves, researchers have now found a way to transmute scar tissue into healthy tissue in mice, thereby walking back some of the damage brought about by heart attacks.