Surgeons have been opening chests and implanting pacemakers for decades. The devices save millions of people by controlling their abnormal heartbeats. Now doctors are testing a new version of ...

There are two common implantable devices for the heart: artificial pacemakers and defibrillators. Artificial pacemakers keep ...

A lithium-ion battery made from three droplets of hydrogel is the smallest soft battery of its kind – and it could be used in biocompatible and biodegradable implants ...