Just when you thought engineering couldn't get more fantastic, they come up with stuff like surgical tools that move along with a beating heart:

Surgeons may soon be able to operate on a beating heart. Motion compensation software that synchronises the movement of robotic surgical tools with that of the heart will make it possible to operate without stopping or even slowing the heart down. The software, developed by George Mylonas at Imperial College London (ICL), has been designed for use with a type of surgical robot called da Vinci to perform procedures such as arterial bypass surgery.

A-f'ing-mazing.